Fix touch feedback and areas for status bar date & time actions

Occupy the entire height for 48dp touch targets and better touch
background appearance. Remove the redundant background and click action
from the containing layout.

Change-Id: If343e6eb429a7fef38a23c1c9a46c75a95e50ed6
Navbar: Fix MDPI & HDPI landscape layout

Before: http://i.imgur.com/89SmFbX.png
After: http://i.imgur.com/UbuAggD.png

Change-Id: I6623cb97881313886de39a67baa98f7bd4b0696a
Fix charging indication.

This commit fixes a number of issues in the new battery drawing code:
- Use the BatteryTracker instances consistently
- Don't indicate charging (by displaying the bolt or the circle
  animation) if the device is connected to a charger, but not actually
  charging, e.g. because of the charger not providing a sufficient
  amount of current.
- Fix some style issues (variable naming)

Change-Id: I957c8c525310170a3d4480047fbf6e92533c0296
WifiController: fix high perf lock sometimes not respected

When the device screen is turned off, the state is DeviceActive for
15 minutes. In this time, high perf lock is not respected and
Wi-Fi power-saving mode will be turned on because screen is off.

Fix by adding a new DeviceActiveHighPerfState.

Change-Id: I71074beec4d41286dea0861107d7931da205aca2
JIRA: CYAN-2860
frameworks/base: remove some duplicate ringtones/notification sounds

PS2: Start mk file cleanup
PS3: Remove empty mk files
PS4: Remove more dupes and unused audio

Change-Id: I7a091218e41b3cf7eea9738d9ea569d9cb3ee91d
SystemUI: fix SearchPanel gesture in landscape mode.

Change-Id: I8f98b30e9f66f1ae96c85363a8a4af679e1173d6