Rate limiting PiP aspect ratio change request

Using CountQuotaTrack to limit how frequent an app can request aspect
ratio change via PictureInPictureParams, which could result flood of PiP
resizing requests and freeze the PiP window.

Note that CountQuotaTrack is initialized out of the WM lock to avoid
dead lock with the AM one.

Bug: 283103220
Test: Manually, using the POC app
Test: Manually, switching YT PiP video functions at a regular rate
Test: atest WindowOrganizerTests ActivityThreadTest
Merged-In: Icb7dd17bbf7df573a9bb28f3dc56e90e78384f4f
Change-Id: Icb7dd17bbf7df573a9bb28f3dc56e90e78384f4f