UNC: added option for Progress bar tracking
Shows progress bar in status bar for ongoing notifications that contain
progress bar. Requires Progress bar feature in status bar tweaks to be
enabled.
This feature avoids hard-coding supported packages and gives user full
control over progress bar feature.
Download manager and bluetooth transfers are supported implicitly.
Conflicts:
	src/com/ceco/gm2/gravitybox/StatusbarDownloadProgressView.java
	src/com/ceco/gm2/gravitybox/ledcontrol/LedSettings.java
	src/com/ceco/gm2/gravitybox/ledcontrol/LedSettingsActivity.java
	src/com/ceco/gm2/gravitybox/ledcontrol/LedSettingsFragment.java
	src/com/ceco/kitkat/gravitybox/ModLedControl.java