Remove unused deferClearAllDrawn

The flag was added in commit 7636dfb and the only read
was removed in commit f5f9e12 (version P, 2 years ago).

Also correct the dump format of activity record.

Test: presubmit
Bug: 139522754
Change-Id: Ie81bf5c758e1c537994ddded937c4ace10ef86ab
4 files changed