Fix double-checked locking bug in LocalSocket.
Fix double-checked locking bug in LocalSocket.

This code uses a try/finally to maintain the old behavior of setting
implCreated even if creation fails.

Change-Id: Ieac05568477db4908cd4087714cf00a9addd1d20

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base