build: releasetools: ota: Add support for 32-64 bit upgrades

We now use the new API to determine if the update package is compatible
with the device it is currently being applied on or not. We also use the
32 bit updater libraries while compiling the ota package

Change-Id: I4d1d2bd90e03e6f4b2f786d25c6d02f62243c3f3