QS: Fix handling of dialer checks

Fixes an issue with network tile. Previously, if SystemUI crashed the network
mode tile would be disabled per the dialer check because constructor initialized
mUsesAospDialer to false.  Now we initialize it to the value of the system setting
and set it to 0 on shutdown.

Corrects display of disabled when the user has google dialer installed. Before,
the rssiTile would default to unknown.  Now it checks if google dialer is being
used and properly sets the disabled string.

PS1: Initial implement
PS2: Fix indents
PS3: Refactor content resolver
PS4: Update commit message
PS5: Style fixes

Signed-off-by: Evan Anderson <evan@thelinuxman.us>
Change-Id: I75cd767667924762fa432c29192674ce9c402c20
allow forcing HighEndGfx mode

people have already started fipping the lomRam prop to enable
transparent status bar, this will enable it with fewer
repercussions

Change-Id: Ied6de65276425fa1e7db0bf9da35f1932a355172
Remove dead code.

This hasn't been used since at least 2011, and we're no longer
shipping the data supporting it either.

Change-Id: Ibe42057650b49794c65d6f0d54ed7a492f3b594b
Fix to NullPointerException when activity is relaunched

When ChooseTypeAndAccountActivity is relaunched and resumed
by ActivityManager a call is made to onActivityResult without
first triggering onResume. This leads to mAccounts object
still being null.

Fixed by properly setting mAccounts object if it is null prior
to use after function onCreate has been called.

Change-Id: Ife7e1e052c473970d923fa43ee6189eb62a1113b
Custom lockscreen

Accessible via launcher wallpaper selector and
Settings - Display - Wallpaper - Lock screen

Change-Id: I2e4722d1a6d4ba80a3c656306ceb251d630a8e21