commit 7124ad30da0a161e8886b4593df7e59679d5e2a0
author Yiwei Zhang <zzyiwei@google.com> Wed Feb 21 13:02:45 2018 -0800
committer Yiwei Zhang <zzyiwei@google.com> Thu Mar 08 11:47:47 2018 -0800
tree 17698338c5ae2218ba0e3b1daef4a582f6b08ee0
parent efd3cb0bbd1f95dbe849d9fd0c5641ebbac624d3

Implement Display Layer Stats

Try to collect data for analyzing how many display controller layers we
need and what we use them for. Also part of a bug fixing for potential
memory leak of existing layer tracing work of winscope.

Test: adb shell dumpsys SurfaceFlinger --enable-layer-stats
Test: adb shell dumpsys SurfaceFlinger --disable-layer-stats
Test: adb shell dumpsys SurfaceFlinger --clear-layer-stats
Test: adb shell dumpsys SurfaceFlinger --dump-layer-stats
Bug: b/73668062
Bug: b/74071380
Change-Id: Ie08aa85d34db2c2c767b8e27eb5aad6f7c3fb975