UsbDebuggingManager : Handle race condition when toggling rapidly

When toggling adb enable/disable rapidly, you can have the situation where the thread's
run() gets invoked but mAdbEnabled is already set to false, hence listenToSocket() never even
gets invoked in which case mOutputStream/mSocket are both null. This patchset adds checks
around that.

Change-Id: Iba56e7409435e22d690432fa663bc0a04a1a447d

Conflicts:
	services/java/com/android/server/usb/UsbDebuggingManager.java
Fix Lockscreen Blur
Merge branch 'cm11mod-linaro' into newtheme

Conflicts:
	packages/Keyguard/src/com/android/keyguard/KeyguardViewManager.java
	packages/SystemUI/src/com/android/systemui/quicksettings/EqualizerTile.java
Themes: uninstallThemeForAllApps shouldn't check if map is empty if it's null

Potential NPE introduced in ec2200878706735cdd2caf4d934d988296998e85

Change-Id: I6d1ec165957c2be63086a18af2236e46978e9c8a