* Allow Java based programs to create an opportunistic GATT client
* Such client does not hold a GATT connection. It automatically
disconnects when no other GATT connections are active for the
remote device.
Bug: 63347806
Test: make, run battery service
Change-Id: Ib9333817d7f17a1fa3ddacfa51c680890bac19ec
Merged-In: Ib9333817d7f17a1fa3ddacfa51c680890bac19ec
(cherry picked from commit 13f52c8118)