Update customize button title when state changed

- This CL update customize button title when
  onCustomizedButtonStateChanged() is called.
- Add test case

Bug: 152002708
Test: make -j42 RunSettingsRoboTests
Change-Id: I85c9cf90305757e279c058db2875e303b4add437

tests/robotests/src/com/android/settings/panel/FakePanelContent.java

@@ -46,6 +46,8 @@ public class FakePanelContent implements PanelContent {
     private CharSequence mSubTitle;
     private IconCompat mIcon;
     private int mViewType;
+    private boolean mIsCustomizedButtonUsed = false;
+    private CharSequence mCustomizedButtonTitle;
 
     @Override
     public IconCompat getIcon() {
@@ -97,4 +99,22 @@ public class FakePanelContent implements PanelContent {
     public int getViewType() {
         return mViewType;
     }
+
+    @Override
+    public boolean isCustomizedButtonUsed() {
+        return mIsCustomizedButtonUsed;
+    }
+
+    public void setIsCustomizedButtonUsed(boolean isUsed) {
+        mIsCustomizedButtonUsed = isUsed;
+    }
+
+    @Override
+    public CharSequence getCustomizedButtonTitle() {
+        return mCustomizedButtonTitle;
+    }
+
+    public void setCustomizedButtonTitle(CharSequence title) {
+        mCustomizedButtonTitle = title;
+    }
 }

tests/robotests/src/com/android/settings/panel/PanelFragmentTest.java

@@ -31,6 +31,7 @@ import android.net.Uri;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
+import android.widget.Button;
 import android.widget.LinearLayout;
 import android.widget.TextView;
 
@@ -250,4 +251,27 @@ public class PanelFragmentTest {
 
         verify(mActivity).finish();
     }
+
+    @Test
+    public void onCustomizedButtonStateChanged_isCustomized_showCustomizedTitle() {
+        final ActivityController<FakeSettingsPanelActivity> activityController =
+                Robolectric.buildActivity(FakeSettingsPanelActivity.class);
+        activityController.setup();
+        final PanelFragment panelFragment = (PanelFragment)
+                Objects.requireNonNull(activityController
+                        .get()
+                        .getSupportFragmentManager()
+                        .findFragmentById(R.id.main_content));
+
+        final Button seeMoreButton = panelFragment.mLayoutView.findViewById(R.id.see_more);
+
+        mFakePanelContent.setIsCustomizedButtonUsed(true);
+        mFakePanelContent.setCustomizedButtonTitle("test_title");
+        verify(mFakePanelContent).registerCallback(mPanelContentCbs.capture());
+        final PanelContentCallback panelContentCallbacks = mPanelContentCbs.getValue();
+        panelContentCallbacks.onCustomizedButtonStateChanged();
+
+        assertThat(seeMoreButton.getVisibility()).isEqualTo(View.VISIBLE);
+        assertThat(seeMoreButton.getText()).isEqualTo("test_title");
+    }
 }