SweetBlue 3.2.5 Release

[ryanbis]

• Fixed issue where SweetBlue wasn't checking for the FINE_LOCATION permission on Android 10+
• Added requestBackgroundOperation option, and BleSetupHelper updated to optionally request background location permission (needed for Android 10+ if you want to be able to scan while your app is in the background)
• Added new Scanning document for some more information about, well, scanning.

[AlejandroHCruz]

Thanks a lot for the fixes and documentation! @ryanbis