Update battery settings page loading text

 - Update the loading text into empty space text to prevent layout flaky before info loaded

Bug: N/A
Test: atest SettingsRoboTests
Change-Id: I272405f5045a682533a4e9405a9fd91f6c507f7e
diff --git a/src/com/android/settings/fuelgauge/BatteryHeaderPreferenceController.java b/src/com/android/settings/fuelgauge/BatteryHeaderPreferenceController.java
index ec63c9a..42379b4 100644
--- a/src/com/android/settings/fuelgauge/BatteryHeaderPreferenceController.java
+++ b/src/com/android/settings/fuelgauge/BatteryHeaderPreferenceController.java
@@ -59,9 +59,8 @@
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
         mBatteryUsageProgressBarPref = screen.findPreference(getPreferenceKey());
-        // Set up loading text first to prevent layout flaky before info loaded.
-        mBatteryUsageProgressBarPref.setBottomSummary(
-                mContext.getString(R.string.settings_license_activity_loading));
+        // Set up empty space text first to prevent layout flaky before info loaded.
+        mBatteryUsageProgressBarPref.setBottomSummary(" ");
 
         if (com.android.settings.Utils.isBatteryPresent(mContext)) {
             quickUpdateHeaderPreference();
diff --git a/tests/robotests/src/com/android/settings/fuelgauge/BatteryHeaderPreferenceControllerTest.java b/tests/robotests/src/com/android/settings/fuelgauge/BatteryHeaderPreferenceControllerTest.java
index 9fa9651..1b8d24e 100644
--- a/tests/robotests/src/com/android/settings/fuelgauge/BatteryHeaderPreferenceControllerTest.java
+++ b/tests/robotests/src/com/android/settings/fuelgauge/BatteryHeaderPreferenceControllerTest.java
@@ -35,7 +35,6 @@
 
 import androidx.preference.PreferenceScreen;
 
-import com.android.settings.R;
 import com.android.settings.core.BasePreferenceController;
 import com.android.settings.fuelgauge.batterytip.tips.BatteryTip;
 import com.android.settings.fuelgauge.batterytip.tips.LowBatteryTip;
@@ -374,11 +373,10 @@
     }
 
     @Test
-    public void displayPreference_init_showLoading() {
+    public void displayPreference_init_showEmptySpace() {
         mController.displayPreference(mPreferenceScreen);
 
-        verify(mBatteryUsageProgressBarPref)
-                .setBottomSummary(mContext.getString(R.string.settings_license_activity_loading));
+        verify(mBatteryUsageProgressBarPref).setBottomSummary(" ");
     }
 
     private CharSequence formatBatteryPercentageText() {