Add Google Analytics support

PS2: add custom dimensions and override app-name & app-version
PS3: report unified version name (branch + milestone-X|nightly|unofficial)
PS4-6: further reporting changes
PS7: add back own stats reporting

Change-Id: Ieb69944ba0e67cbaddb0e94c1b87fc99510bdd36

Conflicts:

	src/com/android/settings/aokpstats/Utilities.java