[automerger] Merge "DO NOT MERGE: Bump CTS and CTS Verifier to 7.1_r15" into nougat-mr1-cts-dev am: 485c16b4d3  -s ours am: 906e24b8d2 am: bcf055c28d skipped: c9c83de274
am: ee4a9dd103

Change-Id: I2ee61bf86452bcb268cd5c32381d92b3900612be