Send load up hint on view inflation

In order for HWUI to keep up with sudden changes in workload, it
needs to send hints in advance of view inflation in order to compensate
for these increases. This patch allows HWUI to inform PowerHAL about
upcoming spikes in workload.

Bug: b/261130508
Test: manual
Change-Id: Ie0bb80d021dee13067d1960276065f6f2e0af34d