[QPR1] Add time unit into battery usage chart and refine some UI

- add time unit into battery chart for 12/24 hours
- refine the radius size for chart bar
- use fixed font size for timestamp and percentage

screenshots:
24-hour format: https://screenshot.googleplex.com/3VNedE2nAx6LrXu
12-hour format: https://screenshot.googleplex.com/3tpTXjYfrasrenW
fixed-size: https://screenshot.googleplex.com/nPRKm7XCkmFzW6K

Bug: 194836607
Test: make SettingsRoboTests
Change-Id: I5b35b0fa808eb8a5f607962ee973c2896529b078
Merged-In: I5b35b0fa808eb8a5f607962ee973c2896529b078

tests/robotests/src/com/android/settings/fuelgauge/BatteryChartViewTest.java

@@ -33,7 +33,6 @@ import android.view.accessibility.AccessibilityManager;
 import com.android.settings.testutils.FakeFeatureFactory;
 
 import org.junit.Before;
-import org.junit.Ignore;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.Mock;
@@ -44,7 +43,6 @@ import org.robolectric.RuntimeEnvironment;
 import java.util.Arrays;
 import java.util.ArrayList;
 import java.util.Locale;
-import java.util.TimeZone;
 
 @RunWith(RobolectricTestRunner.class)
 public final class BatteryChartViewTest {
@@ -233,21 +231,4 @@ public final class BatteryChartViewTest {
         verify(mBatteryChartView.mHandler)
             .postDelayed(mBatteryChartView.mUpdateClickableStateRun, 500L);
     }
-
-    @Ignore
-    @Test
-    public void testSetLatestTimestamp_generateExpectedTimestamps() {
-        final long timestamp = 1619196786769L;
-        ConvertUtils.sSimpleDateFormatForHour = null;
-        // Invokes the method first to create the SimpleDateFormat.
-        ConvertUtils.utcToLocalTimeHour(
-            mContext, /*timestamp=*/ 0, /*is24HourFormat=*/ false);
-        ConvertUtils.sSimpleDateFormatForHour
-            .setTimeZone(TimeZone.getTimeZone("America/Los_Angeles"));
-        final String[] expectedTimestamps = new String[] {"00", "06", "12", "18", "00"};
-
-        mBatteryChartView.setLatestTimestamp(timestamp);
-
-        assertThat(mBatteryChartView.mTimestamps).isEqualTo(expectedTimestamps);
-    }
 }