Export callback to receive seekbar change event from SeekBarPrefernce

- Export onSeekBarChangeListener callback to receive change event from parent
  - Update battery saver schedule trigger threshold after seekbar tounch
    ending instead of update it every time during dragging or touching

Bug: 236356020
Test: make RunSettingsRoboTests
Change-Id: Ifee7cd9e7cabfbec0817a4c28254228f885d6a8d

tests/robotests/src/com/android/settings/widget/SeekBarPreferenceTest.java

@@ -24,6 +24,7 @@ import static com.google.common.truth.Truth.assertThat;
 import static org.mockito.ArgumentMatchers.anyInt;
 import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.verifyZeroInteractions;
 import static org.mockito.Mockito.when;
 import static org.robolectric.Shadows.shadowOf;
 
@@ -40,6 +41,7 @@ import com.android.settings.testutils.shadow.ShadowRestrictedLockUtilsInternal;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
+import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 import org.robolectric.RobolectricTestRunner;
 import org.robolectric.RuntimeEnvironment;
@@ -59,6 +61,9 @@ public class SeekBarPreferenceTest {
     private SeekBarPreference mSeekBarPreference;
     private SeekBar mSeekBar;
 
+    @Mock
+    SeekBar.OnSeekBarChangeListener mMockOnSeekBarChangeListener;
+
     @Before
     public void setUp() {
         MockitoAnnotations.initMocks(this);
@@ -179,6 +184,54 @@ public class SeekBarPreferenceTest {
         assertThat(shadowOf(mSeekBar).lastHapticFeedbackPerformed()).isEqualTo(CLOCK_TICK);
     }
 
+    @Test
+    public void onProgressChanged_hasSeekBarChangeListener_receiveCallBack() {
+        mSeekBarPreference.setOnSeekBarChangeListener(mMockOnSeekBarChangeListener);
+
+        mSeekBarPreference.onProgressChanged(mSeekBar, PROGRESS, true);
+
+        verify(mMockOnSeekBarChangeListener).onProgressChanged(mSeekBar, PROGRESS, true);
+    }
+
+    @Test
+    public void onProgressChanged_noSeekBarChangeListener_noAction() {
+        mSeekBarPreference.onProgressChanged(mSeekBar, PROGRESS, true);
+
+        verifyZeroInteractions(mMockOnSeekBarChangeListener);
+    }
+
+    @Test
+    public void onStartTrackingTouch_hasSeekBarChangeListener_receiveCallBack() {
+        mSeekBarPreference.setOnSeekBarChangeListener(mMockOnSeekBarChangeListener);
+
+        mSeekBarPreference.onStartTrackingTouch(mSeekBar);
+
+        verify(mMockOnSeekBarChangeListener).onStartTrackingTouch(mSeekBar);
+    }
+
+    @Test
+    public void onStartTrackingTouch_noSeekBarChangeListener_noAction() {
+        mSeekBarPreference.onStartTrackingTouch(mSeekBar);
+
+        verifyZeroInteractions(mMockOnSeekBarChangeListener);
+    }
+
+    @Test
+    public void onStopTrackingTouch_hasSeekBarChangeListener_receiveCallBack() {
+        mSeekBarPreference.setOnSeekBarChangeListener(mMockOnSeekBarChangeListener);
+
+        mSeekBarPreference.onStopTrackingTouch(mSeekBar);
+
+        verify(mMockOnSeekBarChangeListener).onStopTrackingTouch(mSeekBar);
+    }
+
+    @Test
+    public void onStopTrackingTouch_noSeekBarChangeListener_noAction() {
+        mSeekBarPreference.onStopTrackingTouch(mSeekBar);
+
+        verifyZeroInteractions(mMockOnSeekBarChangeListener);
+    }
+
     public static class TestFragment extends PreferenceFragmentCompat {
         @Override
         public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {