cf4411df43
Rearrange how we generate the transition specs, which involves creating a thumbnail on the mainthread (about 10ms on large devices): First, we put launching the activity onto a handler thread (with default priority), to free up the main thread. Then, we immediately start generating the thumbnail such that when the future calls us we have the generated spec already handy. For that we need to be able to supply a specs future into ActivityOptions, to avoid race conditions. Furthermore we need to make sure not to call into WM while creating specs, to avoid WM lock contention. Test: App -> Recents -> Same app, inspect app transition logs Test: Double tap recents for quick switching Bug: 32668632 Change-Id: Ic6ec65c2560f67cade3b5ddde9f79ee13e9ba32c