Only increase the hotness for UI thread after startup. To avoid JITting adding startup overhead. Test: test.py Test: Compose app, jank doesn't regress Bug: 333701031 Bug: 348349227 (cherry picked from https://android-review.googlesource.com/q/commit:50a7c38d0ec0c8e2817e782ef7f52e6f670ccb33) Merged-In: I07460ed32b8365d7517f2d76beb08314ef8cc293 Change-Id: I07460ed32b8365d7517f2d76beb08314ef8cc293