Quicksettings: Few misc adjustements and fixes.

* Fix sleep time tile label on clean flash boot, was showing unknown till you set it in settings.
  Initialize screen timeout with default 30 seconds (wrongly initialized with 0 that is never compared).
* Use switch statement (better performance wise).
* Bit cleanup for wifi ap tile, useless resources reload.

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>
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