Update Robolectric SDK to 30

Test: Run robolectric tests, such as WidgetsListAdapterTest, from
      Android Studio. (Need manually update JDK to v9.0)

Bug: 179690223
Change-Id: I7c0c696971bd950e83705f5006c70cb260d5b121
diff --git a/robolectric_tests/config/robolectric.properties b/robolectric_tests/config/robolectric.properties
index 4e811f3..0ac997f 100644
--- a/robolectric_tests/config/robolectric.properties
+++ b/robolectric_tests/config/robolectric.properties
@@ -1,4 +1,4 @@
-sdk=29
+sdk=30
 shadows= \
     com.android.launcher3.shadows.LShadowAppPredictionManager \
     com.android.launcher3.shadows.LShadowAppWidgetManager \