Fix issues in Settings: 16660423, 13172381, 16868094

Issue #16660423: Stability: ArrayIndexOutOfBoundsException in settings:
at com.android.settings.fuelgauge.BatteryHistoryChart$ChartData.draw(
BatteryHistoryChart.java:109)

Issue #13172381: No content description in Battery charging section

Issue #16868094: Settings crash on switching to landscape mode with
"Google Text-to-speech" settings icon selected

Change-Id: I94d0e83f72d571eb90aad6742acabce56c0298ec