libhwui: Delete display list objects and resources on the UI thread

Bug #6073717
Bug #6065504
Bug #6026515
Bug #5971725

Prior to this change, the destructor of DisplayList would always run
on the finalizer thread. This could cause a race condition if the UI
thread was busy rendering display lists at the same time leading to
various random native crashes.

CRs-Fixed: 353211, 343109
(cherry picked from commit 14baed35c789e53df7fd5150c90aa1c0c960ac6f)

Change-Id: Ib454326a8df9fc28ee140467a10d370ff21b9766