SF: Fix repaint everything logic

This solves the same problem with dirty regions not being updated
as Ia7a3dc15c96626a213c4459dac4f695d91540fb5, but it is better in a
couple of ways:

  1) It no longer updates dirty regions from a binder thread, which was
     likely causing the memory corruption in b/77919748.
  2) It removes the distinction between repaintEverything and
     repaintEverythingLocked, which is not necessary since both
     operations in repaintEverything (updating an atomic and signaling a
     transaction) are threadsafe.

Bug: 77335744
Bug: 77546473
Bug: 77919748
Test: Manual - on an ASAN build, played TouchLatency bouncy ball while
      toggling between GL and HWC composition; doesn't crash whereas it
      would crash in a matter of a couple minutes before

Change-Id: Iecadfecb40e87e400a301de2dcad1664e154982d