Fixed potention ANR issue with Bluetooth OPP share.

Updated BluetoothOppLauncherActivity so the call to
BluetoothOppManager.saveSendingFileInfo() runs on a child thread.
saveSendingFileInfo() opens/constructs the content stream, which
can take a long time, depending on the type of content.
It should not run inside the main UI thread of the

Bug 6802063

Change-Id: Id34b33fe37eb029d6a7592a811bbc9bbcde14ba8
1 file changed