Fix WM tracing

Fixes: 244260395
Test: capture Winscope dump as follows
    - Enter PiP, e.g. start maps navigation and exit the app
    - Press on the PiP window to make the PiP menu appear
    - Dump state WM in winscope

Change-Id: I0a996e92909be1a79147bc2f9b6a5a5615989488