Using config for robo test configuration so that it can easily be customized

Change-Id: Ibd0957ac5c28fae1f88d524cda29bbc84a7ff7bc
diff --git a/robolectric_tests/config/robolectric.properties b/robolectric_tests/config/robolectric.properties
index 3d78689..0579400 100644
--- a/robolectric_tests/config/robolectric.properties
+++ b/robolectric_tests/config/robolectric.properties
@@ -1 +1,17 @@
 sdk=29
+shadows= \
+    com.android.launcher3.shadows.LShadowAppPredictionManager \
+    com.android.launcher3.shadows.LShadowAppWidgetManager \
+    com.android.launcher3.shadows.LShadowBackupManager \
+    com.android.launcher3.shadows.LShadowBitmap \
+    com.android.launcher3.shadows.LShadowLauncherApps \
+    com.android.launcher3.shadows.LShadowTypeface \
+    com.android.launcher3.shadows.LShadowUserManager \
+    com.android.launcher3.shadows.LShadowWallpaperManager \
+    com.android.launcher3.shadows.ShadowDeviceFlag \
+    com.android.launcher3.shadows.ShadowLooperExecutor \
+    com.android.launcher3.shadows.ShadowMainThreadInitializedObject \
+    com.android.launcher3.shadows.ShadowOverrides \
+    com.android.launcher3.shadows.ShadowSyncRtSurfaceTransactionApplierCompat \
+
+application=com.android.launcher3.util.LauncherTestApplication
\ No newline at end of file