Migrate UiState prefs to repo (#2775)

app/src/main/java/com/geeksville/mesh/util/SharedPreferenceExtensions.kt

@@ -1,33 +0,0 @@
-/*
- * Copyright (c) 2025 Meshtastic LLC
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-package com.geeksville.mesh.util
-
-import android.content.SharedPreferences
-import androidx.core.content.edit
-import kotlinx.coroutines.flow.MutableStateFlow
-
-fun SharedPreferences.toggleBooleanPreference(
-    state: MutableStateFlow<Boolean>,
-    key: String,
-    onChanged: (Boolean) -> Unit = {},
-) {
-    val newValue = !state.value
-    state.value = newValue
-    this.edit { putBoolean(key, newValue) }
-    onChanged(newValue)
-}