Fix some deprecations (#533)

* Implement Firebase segmentation SDK device local cache

* [Firebase Segmentation] Add custom installation id cache layer and tests for it.

* Add test for updating cache

* Switch to use SQLiteOpenHelper

* Switch to use SharedPreferences from SQLite.

* Change the cache class to be singleton

* Wrap shared pref commit in a async task.

* Address comments

* Google format fix

* Replace some deprecated code.

Author: diwu-arete

firebase-segmentation/src/androidTest/java/com/google/firebase/segmentation/CustomInstallationIdCacheTest.java

@@ -18,7 +18,7 @@
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
 
-import androidx.test.InstrumentationRegistry;
+import androidx.test.core.app.ApplicationProvider;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import com.google.android.gms.tasks.Tasks;
 import com.google.firebase.FirebaseApp;
@@ -41,11 +41,11 @@ public void setUp() {
     FirebaseApp.clearInstancesForTest();
     firebaseApp0 =
         FirebaseApp.initializeApp(
-            InstrumentationRegistry.getContext(),
+            ApplicationProvider.getApplicationContext(),
             new FirebaseOptions.Builder().setApplicationId("1:123456789:android:abcdef").build());
     firebaseApp1 =
         FirebaseApp.initializeApp(
-            InstrumentationRegistry.getContext(),
+            ApplicationProvider.getApplicationContext(),
             new FirebaseOptions.Builder().setApplicationId("1:987654321:android:abcdef").build(),
             "firebase_app_1");
     cache = CustomInstallationIdCache.getInstance();

firebase-segmentation/src/androidTest/java/com/google/firebase/segmentation/FirebaseSegmentationInstrumentedTest.java

@@ -16,7 +16,7 @@
 
 import static org.junit.Assert.assertNull;
 
-import androidx.test.InstrumentationRegistry;
+import androidx.test.core.app.ApplicationProvider;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import com.google.firebase.FirebaseApp;
 import com.google.firebase.FirebaseOptions;
@@ -39,7 +39,7 @@ public void setUp() {
     FirebaseApp.clearInstancesForTest();
     firebaseApp =
         FirebaseApp.initializeApp(
-            InstrumentationRegistry.getContext(),
+            ApplicationProvider.getApplicationContext(),
             new FirebaseOptions.Builder().setApplicationId("1:123456789:android:abcdef").build());
   }