[fenix] For https://github.com/mozilla-mobile/fenix/issues/4295 - Adds Experiments Pref to Data Collection Settings (https://github.com/mozilla-mobile/fenix/pull/4915)

app/src/main/java/org/mozilla/fenix/FenixApplication.kt

@@ -74,12 +74,14 @@ open class FenixApplication : Application() {
         experimentLoader = loadExperiments()
 
         // Enable the service-experiments component
+        if (Settings.getInstance(this).isExperimentationEnabled) {
             Experiments.initialize(
                 applicationContext,
                 mozilla.components.service.experiments.Configuration(
                     httpClient = lazy(LazyThreadSafetyMode.NONE) { components.core.client }
                 )
             )
+        }
 
         // When the `fenix-test-2019-08-05` experiment is active, record its branch in Glean
         // telemetry. This will be used to validate that the experiment system correctly enrolls

app/src/main/java/org/mozilla/fenix/settings/DataChoicesFragment.kt

@@ -63,5 +63,10 @@ class DataChoicesFragment : PreferenceFragmentCompat() {
 
             onPreferenceChangeListener = SharedPreferenceUpdater()
         }
+
+        findPreference<SwitchPreference>(getPreferenceKey(R.string.pref_key_experimentation))?.apply {
+            isChecked = Settings.getInstance(context).isExperimentationEnabled
+            onPreferenceChangeListener = SharedPreferenceUpdater()
+        }
     }
 }

app/src/main/java/org/mozilla/fenix/utils/Settings.kt

@@ -90,6 +90,11 @@ class Settings private constructor(
         default = true
     )
 
+    val isExperimentationEnabled by booleanPreference(
+        appContext.getPreferenceKey(R.string.pref_key_experimentation),
+        default = true
+    )
+
     val shouldAutoBounceQuickActionSheet: Boolean
         get() = autoBounceQuickActionSheetCount < autoBounceMaximumCount
 

app/src/main/res/values/preference_keys.xml

@@ -27,6 +27,7 @@
     <string name="pref_key_theme" translatable="false">pref_key_theme</string>
     <string name="pref_key_leakcanary" translatable="false">pref_key_leakcanary</string>
     <string name="pref_key_remote_debugging" translatable="false">pref_key_remote_debugging</string>
+    <string name="pref_key_experimentation" translatable="false">pref_key_experimentation</string>
 
     <!-- Data Choices -->
     <string name="pref_key_telemetry" translatable="false">pref_key_telemetry</string>

app/src/main/res/xml/data_choices_preferences.xml

@@ -9,4 +9,9 @@
         android:summary="@string/preferences_usage_data_description"
         android:title="@string/preference_usage_data"
         app:iconSpaceReserved="false" />
+    <androidx.preference.SwitchPreference
+        android:key="@string/pref_key_experimentation"
+        android:summary="@string/preference_experiments_summary"
+        android:title="@string/preference_experiments"
+        app:iconSpaceReserved="false" />
 </PreferenceScreen>