Play a tone when wireless charging begins.

Only plays a tone if the battery level is below 95% which
is the same heuristic used when determining whether to turn
the screen on.

Use new low battery and wireless charging sounds on Mako.

Bug: 7371658
Change-Id: Ia4527ec398d024ee418a4287e1fcbf0ec83bcc24

Conflicts:
	core/res/res/values/symbols.xml
	data/sounds/AudioPackage10.mk
	packages/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java
	services/java/com/android/server/power/PowerManagerService.java

Signed-off-by: travp624 <travp624@gmail.com>
Improve heuristics for detecting wireless chargers.

On some devices, we need to apply heuristics to determine whether
the device is docked on a wireless charger because the charging
circuits do not provide sufficient information to know whether
the device is on the charger unless it is actually receiving
power.

The previous heuristics only considered the battery level to
suppress spurious dock signals.

The new heuristics also take into account whether the device
appears to have moved from its previous position on the dock.

Bug: 7744185
Change-Id: I5ba885dac25b37840b6db46b8a0f30968a06776c