> Closing existing preview if a new request comes for same host token
> Closing in-memory icon db when closing preview
> Removing unnecessary wait blocks on UI thread and rendering
view asynchronously
> Fixing preview loading failing on LauncherAppState access
Bug: 186712316
Bug: 187140897
Test: Manual
Change-Id: I045930b007e5dc015320224a197eee20a8354d17
which could be caused by the following sequence of events
1) Starts preload => execution moved to background thread
a) check if loader is running
... execution moved to ui thread
2) Launcher starts
3) Cancels any running loader and starts a new loader
.... Execution on background thread
b) Cancels any running loader and starts a new loader
Synchronizing (3), and [a, b] under same lock would avoid this case
Bug: 73399920
Change-Id: I6b01f797fd6f4a2e5b3c078bb374ad40fcc311c8