Add property check for gd shim entry

Bug: 14042172
Test: Ensure boot into both stacks
Test: adb shell stop; adb shell setprop bluetooth.gd.enabled 1 ; adb shell start
Test: adb shell stop; adb shell setprop bluetooth.gd.enabled 0 ; adb shell start

Change-Id: Ied131f5444dd33201197e9f19d0f4bc88c069f8c