Adds a flag to allow collection of Looper and Binder stats even when

charging. This is done for automotive form factor. Notion of battery is
not as significant as it is in phones.

Test: atest FrameworksCoreTests:LooperStatsTest & atest
FrameworksCoreTests:BinderCallStatsTest

Change-Id: I05c92bccda39fb4fbc9cf770b179edabe01e8f11