Check if the Activity is finishing before showDialog()

Check if the Activity is going through its finishing phase before
displaying the Dialog, because Showing dialog once the activity
is no longer in context will cause BadTokenException.

Change-Id: I58940e694f61cd79536abe2df60a0b745a7b806f
Fix "Add Network" show last selected WiFi AP Dialog

When user taps Wi-Fi add network button, the pop-up dialog is not empty (it shows last selected WiFi AP Dialog).
The above is observed after the following steps:
- Launch Settings application
- Turn on Wi-Fi
- Select any Wi-Fi Access Point which is not connected previously and change to portrait mode
- Press Cancel from the pop-up and select Add Network icon in menu

Because the "Rotation" operation will cause WifiDialog re-creating and the current settings
of selected Wi-Fi Access Point is saved before WifiDialog destroyed.
Then, the saved Wi-Fi Access Point is displayed when user tap on "Add Network".

It need to clear the saved Wi-Fi Access Point when WifiDialog re-creating.

Change-Id: I3e93943e5bee405329e309c3ec88a35ee9cafc43
Contact icon label

Change-Id: I55373c25386e9d3954aebfed50222e023e989d0b
Option to use volume keys to control media volume anytime (1/2)

Some users don't adjust ringtone volume often (e.g. only use toggle to
switch between silent and non-silent) mode. Having an option to
use the volume keys to control media volume anytime allows media
volume to be controllled/muted before entering a game or other apps
with sound in an undesirable location.

Change-Id: I6dbd25d1a14bcf5b1bf0b0468b96f4b4f8efdb14

Conflicts:
	res/values/cm_strings.xml
Completely remove app ops activity.

Change-Id: Ibe2f15c9ff7589fd5527a0f249d7c1eeca868c8a
Navbar extra settings