Fix recent panel defaulting to white on clean flash

Previously, recent panel would default to a solid
    white background on clean flash, until the user
    changed/reset the colors.  This fixes that issue,
    and the recent panel background now defaults to
    the proper semi-transparent white drawable (or
    semi-transparent black drawable if the TRDS
    state is switched).

Change-Id: Iea9d292596e8f4f51b55940e97e6597215ca58c2
Themes: Only kill launchers if overlays or icons changed

There is no need to kill the launcher for every coponent changed.
The only ones that really concern us in regards to killing launchers
are MODIFIES_OVERLAYS and MODIFIES_ICONS

Change-Id: I3b32a20431f242f58c1708f72418322f0a5db44e