DO NOT MERGE: settings: Support for different number of signal bars

Status Bar Settings
DO NOT MERGE!!! Settings complete, but frameworks is not
Adds support for user defined signal bar number. The option to
have 4, 5, or 6 signal bars is being added to frameworks/base,
but is not yet complete. All comments/suggestions are
appreciated!

PS1: Initial commit
PS2: Fix whitespace
PS3: Add a few missing lines, change strings to numbers
     not letters, add "AOSP Default" as description for
     the number 4
PS4: Add actual settings item
PS5: Oops, fix error in status_bar.xml

Change-Id: I16ceaf4ebc99dd8575947aa43c9d796bb4270547

Conflicts:
	src/com/android/settings/cyanogenmod/StatusBar.java