Notify InputEventAssigner about every frame

InputEventAssigner does not currently get notified about all frames. In
the existing logic, only the cases for batched consumption would be
counted as 'choreographer callback'. This misses several cases, such as:

1) CALLBACK_INPUT was never scheduled, but a frame is produced
2) CALLBACK_INPUT was scheduled, but no events were consumed

However, it is critical that InputEventAssigner knows about all frames,
because it needs to reset the 'down' state for proper frame attribution.

At the same time, we refactor the logic in InputEventAssigner. In the
updated logic, we will specifically store the event id with ACTION_DOWN
only. In all other cases, we will use the current / latest input event.

In this CL, we reset the 'down' state after the input event id is
used for the current frame. A good proxy for that is the
ThreadedRenderer::draw call, which in turns
calls attachInfo.mViewRootImpl.getUpdatedFrameInfo().

Also, rename "onChoreographerCallback" since it's not exactly clear
which callback this is referring to. In the new logic, this callback
will happen from 'draw'/'onDraw' functions.

Bug: 167947340
Test: add LOG_ALWAYS_FATAL crashes in LatencyTracker for duplicate
'reportTimeline' calls. The crashes are gone after this CL.

Change-Id: I5fad6665d10e0594963209b138e9bd2bdf00ca38