Add FileUtils.checksumCrc32
Add FileUtils.checksumCrc32

Change-Id: Ic6bffcb66554d7af38cea68648d9431fda8ef10d

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