30481342: Security Vulnerability - TOCTOU in MmsProvider allows access to files as phone (radio) uid - DO NOT MERGE am: 53ff7691e0 am: 20903846d5 am: 37e2a4dca9  -s ours
am: 8c659fb296

Change-Id: Iece1e46af8102faad9dd9f27834b364e1549cb05