Fix Connect State message in Device details for Hearing Aids

In the Device details of Settings App and when using two Hearing Aids
devices (left and right sides), this will fix the connect state messages
for these two devices. Also added Robo tests for the changes.

Bug: 116725094
Bug: 117074814
Test: Manual tests and also ran RunSettingsLibRoboTests and RunSettingsRoboTests.

Change-Id: I169cda4a1658b0a67cc7c7367b38d57a021e6953
Merged-In: I0b1a170967ddcce7f388603fd521f6ed1eeba30b
Merged-In: I169cda4a1658b0a67cc7c7367b38d57a021e6953