Adding area members to the pairing tests

Moving pairing related aosp Avatar and Bumble tests into separate
subfolders. And adding area members to these subfolders.

Bug: 321014597
Test: atest BumbleBluetoothTests:android.bluetooth
Test: avatar run --mobly-std-log --include-filter="SmpTest
Flag: EXEMPT Test ownership changes, no logical change
Change-Id: I35cc9180180d847430b9a3e325ffbed83be3845e