Introduce SurfaceFlinger Queued Transaction

Implements the transaction queue to store the transaction updated from
'setTransactionState', and apply these queued transactions in main
thread. That would prevent holding the state lock between binder thread
and main thread.

- The setTransactionState won't call 'applyTransactionState' directly.
- The queue is protected by queue lock, apply/get states will still be
  protected by state lock.
- drain and apply transaction queue should be triggered in main thread.
- Sync transaction will wait after the condition broadcast, protected
  by stack lock.

Test: atest libsurfaceflinger_unittest SurfaceFlinger_test libgui_test
Bug: 166236811
Change-Id: Iab78a6d1e554d28eb4ffc5df860263ecb9091749