P4A: Make Android permissions optional/configurable

[vabt-igd]

Hey,

would you be willing to make the permissions in the Android backend optional or configurable?
As can be read here, it is not always necessary nor desired to ask for [Permission.ACCESS_FINE_LOCATION, Permission.ACCESS_COARSE_LOCATION, "android.permission.ACCESS_BACKGROUND_LOCATION"].
On newer devices and depending on the use case, it may be sufficient to ask for [(name=android.permission.BLUETOOTH_SCAN;usesPermissionFlags=neverForLocation), android.permission.BLUETOOTH_CONNECT].

If you were willing to accept such a change, I would be happy to contribute with a PR and do some minor testing (I currently only have access to two android devices running on API level 31 and 32).

[dlech]

If you can make it work for both old and new Android API levels at the same time, happy to look at a PR.

[vabt-igd]

Perfect. I'll see, if I can come up with a solution and will ping you in a PR, when ready.