Change Instrumentation to call injectInputAfterTransactionApplied

Instrumentation.sendPointerSync currently calls direclty into
InputManager to inject input. Instead have it call
injectInputAfterTransactionApplied to ensure it waits for animations
to complete and input windows to get set.

Additionally, changed injectInputAfterTransactionApplied to call
InputManagerInternal instead of InputManager to prevent the calling pid
from changing. This ensures the permission check remains tied to the client
that injected the input.

Bug: 123616343
Bug: 120920331
Test: atest HoverTest
Change-Id: I8c893e47fea9bd38e92da0ffa668ebca066f1080