Utilize Measured Energy data in PowerStatsViewer

Display measured energy adjusted screen power alongside the currently
reported screen power. Also report measured ambient display power to the
Ambient display drain.

Test: manual ("mp :PowerStatsViewer", will show adjusted screen power on PowerStatsHal2.0 enabled devices with display rails)
Bug: 172361024
Change-Id: Ia77d0eacff03b9bf671110ecf9719b121c6fe2c0