ANDROID: GKI: power: supply: Add snapshot of power supply framework files

This is a snapshot of the power supply framework-related files as of
msm-4.14 commit defdcf8dc74c ('Merge "power_supply: Add MAIN_FCC_MAX
 property"'). This is needed to support QTI charger and USB_PD drivers.

Signed-off-by: Guru Das Srinagesh <gurus@codeaurora.org>
(cherry picked from commit 9bec986d5ab779416cf977a88003057f2a48fe25)
Signed-off-by: Mark Salyzyn <salyzyn@google.com>
Bug: 150789066
Change-Id: I9cb7dd7c5f39f52a9cf708bce818a225548306be