Add a flag to guard removing the address mapping on device removal

Test: m com.android.btservices

Bug: 326603271
Bug: 315241296
Change-Id: I5f4194719ab3977246466144dcd63501e675cceb

flags/framework.aconfig

@@ -49,3 +49,10 @@ flag {
     description: "Change visibility of BluetoothDevice#getAddressType API to public"
     bug: "321120941"
 }
+
+flag {
+    name: "remove_bond_with_address_map"
+    namespace: "bluetooth"
+    description: "Removes the address map when the bond is removed"
+    bug: "326603271"
+}