Add window manager tracing

Bug: 64831661
Test: adb shell cmd wm tracing start && adb shell cmd wm tracing stop
Test: runtest -x services/tests/servicestests/src/com/android/server/wm/WindowTracingTest.java
Change-Id: I6ebbb25fea8dd07ac8773edad61cc8b14dcda6a7
18 files changed