prop: Force purgeable assets by default

Change-Id: If08b165549accfc572d27dc6f1ba7fffa3e527f9
Disable entropy gathering for MMC device (cyanogen)

Change-Id: Idbfc7fd4ed4dabc7144326fbbc4aeddf0249170a
vision: Remove SDK blobs (aka goldfish)

Change-Id: I795e60b527bcd1d051f1576766263ef98e0cfb3a