FFs can now be toggled in release builds too (#3101)

- Removed `StaticFeatureFlagProvider`.
- Always provide `PreferencesFeatureFlagProvider`.
- For the default values of feature flags, use a lambda with a `BuildMeta` parameter so we can customize the return value based on its data.

samples/minimal/build.gradle.kts

@@ -30,6 +30,10 @@ android {
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
     }
 
+    buildFeatures {
+        buildConfig = true
+    }
+
     buildTypes {
         release {
             isMinifyEnabled = false

samples/minimal/src/main/kotlin/io/element/android/samples/minimal/RoomListScreen.kt

@@ -35,6 +35,8 @@ import io.element.android.features.roomlist.impl.migration.SharedPreferencesMigr
 import io.element.android.features.roomlist.impl.search.RoomListSearchDataSource
 import io.element.android.features.roomlist.impl.search.RoomListSearchPresenter
 import io.element.android.libraries.core.coroutine.CoroutineDispatchers
+import io.element.android.libraries.core.meta.BuildMeta
+import io.element.android.libraries.core.meta.BuildType
 import io.element.android.libraries.dateformatter.impl.DateFormatters
 import io.element.android.libraries.dateformatter.impl.DefaultLastMessageTimestampFormatter
 import io.element.android.libraries.dateformatter.impl.LocalDateTimeProvider
@@ -44,7 +46,7 @@ import io.element.android.libraries.eventformatter.impl.ProfileChangeContentForm
 import io.element.android.libraries.eventformatter.impl.RoomMembershipContentFormatter
 import io.element.android.libraries.eventformatter.impl.StateContentFormatter
 import io.element.android.libraries.featureflag.impl.DefaultFeatureFlagService
-import io.element.android.libraries.featureflag.impl.StaticFeatureFlagProvider
+import io.element.android.libraries.featureflag.impl.PreferencesFeatureFlagProvider
 import io.element.android.libraries.fullscreenintent.api.FullScreenIntentPermissionsPresenter
 import io.element.android.libraries.fullscreenintent.api.FullScreenIntentPermissionsState
 import io.element.android.libraries.indicator.impl.DefaultIndicatorService
@@ -78,8 +80,12 @@ class RoomListScreen(
     private val sessionVerificationService = matrixClient.sessionVerificationService()
     private val encryptionService = matrixClient.encryptionService()
     private val stringProvider = AndroidStringProvider(context.resources)
+    private val buildMeta = getBuildMeta(context)
     private val featureFlagService = DefaultFeatureFlagService(
-        providers = setOf(StaticFeatureFlagProvider())
+        providers = setOf(
+            PreferencesFeatureFlagProvider(context = context, buildMeta = buildMeta)
+        ),
+        buildMeta = buildMeta,
     )
     private val roomListRoomSummaryFactory = RoomListRoomSummaryFactory(
         lastMessageTimestampFormatter = DefaultLastMessageTimestampFormatter(
@@ -195,4 +201,24 @@ class RoomListScreen(
             }
         }
     }
+
+    private fun getBuildMeta(context: Context): BuildMeta {
+        val buildType = BuildType.valueOf(BuildConfig.BUILD_TYPE.uppercase())
+        val name = context.getString(R.string.app_name)
+        return BuildMeta(
+            isDebuggable = BuildConfig.DEBUG,
+            buildType = buildType,
+            applicationName = name,
+            productionApplicationName = name,
+            desktopApplicationName = name,
+            applicationId = BuildConfig.APPLICATION_ID,
+            lowPrivacyLoggingEnabled = false,
+            versionName = BuildConfig.VERSION_NAME,
+            versionCode = BuildConfig.VERSION_CODE.toLong(),
+            gitRevision = "",
+            gitBranchName = "",
+            flavorDescription = "",
+            flavorShortDescription = "",
+        )
+    }
 }