Emulator 28.0.11 to Canary

Android Emulator 28.0.11 is now available in the Canary and Dev channels.

• Fixed an issue where closing the emulator would disable the UI, but not actually close the emulator.
• Fixed concurrency issues in OpenGL / launching render threads, which could result in double frees or corrupted data.
• Fixed issue where the emulator window would have an afterimage or teleport offscreen when resuming a snapshot where the device orientation was different from the AVD's default orientation.
• Fixed an issue that reappeared in macOS 10.14 in which using Bluetooth headsets with the emulator would degrade audio globally. The Mac emulator will now completely avoid using Bluetooth audio. Issue link: https://issuetracker.google.com/issues/37070892