getCallingSid: get calling security context This call gets the security context of the calling process when requested. Bug: 121035042 Test: boot Change-Id: Ia8a4c0cb4a9c86dcc0d3b7583014237f879a3074 Merged-In: Ia8a4c0cb4a9c86dcc0d3b7583014237f879a3074 (cherry picked from commit b935356c420bd09b85dcd62fc61baff85b1685ae)