Adding method to update processing state of isolated process via the
non-isolated counterpart. It creates a proxy to invoke the
updateProcessingState method via system-server callback.

Context: go/isolated-aicore

Test:make
Bug:316589195
API-Coverage-Bug: 323147058
Change-Id: I3f5fa63f48d3e026a1d25172042fbe585d8cb448
8 files changed