Introduce Hilt dependency injection

Uses Hilt to get the database initialization off of the
main thread.

The initial introduction always has a disproportionate
fan-out of boilerplate. In this case, all entry points which
were using UIViewModel needed to be annotated in order to let
the code gen know that they needed to support it.

The PacketRepository is injected into things via the main
thread (e.g., the MeshService) but due to the lazy declaration,
the database isn't hydrated until the DAO is access while on an
IO thread.

app/src/main/java/com/geeksville/mesh/ui/AdvancedSettingsFragment.kt

@@ -6,7 +6,6 @@ import android.view.View
 import android.view.ViewGroup
 import android.view.inputmethod.EditorInfo
 import androidx.fragment.app.activityViewModels
-import androidx.lifecycle.Observer
 import com.geeksville.android.Logging
 import com.geeksville.android.hideKeyboard
 import com.geeksville.mesh.R
@@ -16,7 +15,9 @@ import com.geeksville.mesh.model.UIViewModel
 import com.geeksville.mesh.service.MeshService
 import com.geeksville.util.exceptionToSnackbar
 import com.google.android.material.snackbar.Snackbar
+import dagger.hilt.android.AndroidEntryPoint
 
+@AndroidEntryPoint
 class AdvancedSettingsFragment : ScreenFragment("Advanced Settings"), Logging {
     private val MAX_INT_DEVICE = 0xFFFFFFFF
     private var _binding: AdvancedSettingsBinding? = null

app/src/main/java/com/geeksville/mesh/ui/ChannelFragment.kt

@@ -33,6 +33,7 @@ import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import com.google.android.material.snackbar.Snackbar
 import com.google.protobuf.ByteString
 import com.google.zxing.integration.android.IntentIntegrator
+import dagger.hilt.android.AndroidEntryPoint
 import java.security.SecureRandom
 
 
@@ -51,6 +52,7 @@ fun ImageView.setOpaque() {
     imageAlpha = 255
 }
 
+@AndroidEntryPoint
 class ChannelFragment : ScreenFragment("Channel"), Logging {
 
     private var _binding: ChannelFragmentBinding? = null

app/src/main/java/com/geeksville/mesh/ui/DebugFragment.kt

@@ -6,13 +6,15 @@ import android.view.View
 import android.view.ViewGroup
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.viewModels
-import androidx.lifecycle.Observer
+import androidx.lifecycle.asLiveData
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import com.geeksville.mesh.R
 import com.geeksville.mesh.databinding.DebugFragmentBinding
 import com.geeksville.mesh.model.UIViewModel
+import dagger.hilt.android.AndroidEntryPoint
 
+@AndroidEntryPoint
 class DebugFragment : Fragment() {
 
     private var _binding: DebugFragmentBinding? = null
@@ -48,8 +50,8 @@ class DebugFragment : Fragment() {
         binding.closeButton.setOnClickListener {
             parentFragmentManager.popBackStack()
         }
-        model.allPackets.observe(viewLifecycleOwner, Observer { packets ->
+        model.allPackets.asLiveData().observe(viewLifecycleOwner) { packets ->
             packets?.let { adapter.setPackets(it) }
-        })
+        }
     }
 }

app/src/main/java/com/geeksville/mesh/ui/MapFragment.kt

@@ -32,8 +32,10 @@ import com.mapbox.maps.extension.style.sources.generated.GeoJsonSource
 import com.mapbox.maps.plugin.animation.MapAnimationOptions
 import com.mapbox.maps.plugin.animation.flyTo
 import com.mapbox.maps.plugin.gestures.gestures
+import dagger.hilt.android.AndroidEntryPoint
 
 
+@AndroidEntryPoint
 class MapFragment : ScreenFragment("Map"), Logging {
 
     private val model: UIViewModel by activityViewModels()

app/src/main/java/com/geeksville/mesh/ui/MessagesFragment.kt

@@ -26,6 +26,7 @@ import com.geeksville.mesh.databinding.MessagesFragmentBinding
 import com.geeksville.mesh.model.UIViewModel
 import com.geeksville.mesh.service.MeshService
 import com.google.android.material.chip.Chip
+import dagger.hilt.android.AndroidEntryPoint
 import java.text.DateFormat
 import java.util.*
 
@@ -41,6 +42,7 @@ fun EditText.on(actionId: Int, func: () -> Unit) {
     }
 }
 
+@AndroidEntryPoint
 class MessagesFragment : ScreenFragment("Messages"), Logging {
 
     private var _binding: MessagesFragmentBinding? = null

app/src/main/java/com/geeksville/mesh/ui/SettingsFragment.kt

@@ -49,6 +49,7 @@ import com.google.android.gms.location.LocationSettingsRequest
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import com.google.android.material.snackbar.Snackbar
 import com.hoho.android.usbserial.driver.UsbSerialDriver
+import dagger.hilt.android.AndroidEntryPoint
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
@@ -439,6 +440,7 @@ class BTScanModel(app: Application) : AndroidViewModel(app), Logging {
 }
 
 @SuppressLint("NewApi")
+@AndroidEntryPoint
 class SettingsFragment : ScreenFragment("Settings"), Logging {
     private var _binding: SettingsFragmentBinding? = null
 

app/src/main/java/com/geeksville/mesh/ui/UsersFragment.kt

@@ -9,7 +9,6 @@ import android.view.ViewGroup
 import androidx.core.content.ContextCompat
 import androidx.core.text.HtmlCompat
 import androidx.fragment.app.activityViewModels
-import androidx.lifecycle.Observer
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import com.geeksville.android.Logging
@@ -19,9 +18,11 @@ import com.geeksville.mesh.databinding.AdapterNodeLayoutBinding
 import com.geeksville.mesh.databinding.NodelistFragmentBinding
 import com.geeksville.mesh.model.UIViewModel
 import com.geeksville.util.formatAgo
+import dagger.hilt.android.AndroidEntryPoint
 import java.net.URLEncoder
 import kotlin.math.roundToInt
 
+@AndroidEntryPoint
 class UsersFragment : ScreenFragment("Users"), Logging {
 
     private var _binding: NodelistFragmentBinding? = null