Prevent reinstallation of an already in-use group key am: 2468ddd04c am: a4f63abeaf am: a97bdd1e6a am: d342625506  -s ours am: 33a5eb14c8  -s ours am: ebbe748e77  -s ours am: fe9172e37f  -s ours am: d4e3ab5756  -s ours am: bebe319591  -s ours am: 232bb0d788  -s ours am: 8ced5b0836  -s ours am: 9e6d852b38  -s ours
am: 1c41afa0b7  -s ours

Change-Id: Ie0cb34a0f6f144ec152d1b20ed7faa74e6c1618b