Merge "Fix NPE of CoreSettingsObserverTest"

import static com.google.common.truth.Truth.assertWithMessage;

import static org.junit.Assert.assertEquals;

import static org.mockito.Mockito.mock;

import static org.mockito.Mockito.anyInt;

import static org.mockito.Mockito.when;

import android.content.Context;

    private ActivityManagerService mAms;

    @Mock private Context mContext;

    @Mock private Resources mResources;

    private MockContentResolver mContentResolver;

    private CoreSettingsObserver mCoreSettingsObserver;

        mContentResolver = new MockContentResolver(mContext);

        mContentResolver.addProvider(Settings.AUTHORITY, new FakeSettingsProvider());

        when(mContext.getContentResolver()).thenReturn(mContentResolver);

        when(mContext.getResources()).thenReturn(mock(Resources.class));

        when(mContext.getResources()).thenReturn(mResources);

        // To prevent NullPointerException at the constructor of ActivityManagerConstants.

        when(mResources.getStringArray(anyInt())).thenReturn(new String[0]);

        when(mResources.getIntArray(anyInt())).thenReturn(new int[0]);

        mAms = new ActivityManagerService(new TestInjector(mContext),

                mServiceThreadRule.getThread());