Makes Light/Dark themes extend appcompat themes.

PiperOrigin-RevId: 269587161
Change-Id: I28ea6c40e5aa06ecbc23c9c10b2971f9814e14a8
diff --git a/src/main/java/com/google/android/libraries/feed/sharedstream/ui/res/values/themes.xml b/src/main/java/com/google/android/libraries/feed/sharedstream/ui/res/values/themes.xml
index 5582496..bfa1233 100644
--- a/src/main/java/com/google/android/libraries/feed/sharedstream/ui/res/values/themes.xml
+++ b/src/main/java/com/google/android/libraries/feed/sharedstream/ui/res/values/themes.xml
@@ -16,7 +16,7 @@
 -->
 <resources xmlns:android="http://schemas.android.com/apk/res/android">
 
-  <style name="Light">
+  <style name="Light" parent="@style/Theme.AppCompat.Light">
     <item name="feedBlueTitleColor">@color/feed_modern_blue_600</item>
     <item name="feedMoreButtonRipple">@color/feed_alpha_10_modern_blue_600</item>
     <item name="feedTouchNonPressed">@android:color/white</item>
@@ -27,7 +27,7 @@
     <item name="feedSpinnerColor">@color/google_blue_500</item>
   </style>
 
-  <style name="Dark">
+  <style name="Dark" parent="@style/Theme.AppCompat">
     <item name="feedBlueTitleColor">@color/feed_modern_blue_300</item>
     <item name="feedMoreButtonRipple">@color/feed_alpha_10_modern_blue_300</item>
     <item name="feedTouchNonPressed">@color/feed_modern_grey_900_white_alpha_4</item>
diff --git a/src/test/java/com/google/android/libraries/feed/sharedstream/ui/MaterialSpinnerViewTest.java b/src/test/java/com/google/android/libraries/feed/sharedstream/ui/MaterialSpinnerViewTest.java
index 66735ea..0ddad83 100644
--- a/src/test/java/com/google/android/libraries/feed/sharedstream/ui/MaterialSpinnerViewTest.java
+++ b/src/test/java/com/google/android/libraries/feed/sharedstream/ui/MaterialSpinnerViewTest.java
@@ -33,7 +33,9 @@
 
   @Before
   public void setUp() {
-    materialSpinnerView = new MaterialSpinnerView(Robolectric.buildActivity(Activity.class).get());
+    Activity context = Robolectric.buildActivity(Activity.class).get();
+    context.setTheme(R.style.Light);
+    materialSpinnerView = new MaterialSpinnerView(context);
   }
 
   @Test