Bug 988437 - Part 1: Allow unpickling across Android Account types; bump pickle version. r=rnewman, a=sylvestre

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extra : source : 6f78648a91a0d6fe147c7c907255bf2964a51bfa
Bug 988437 - Part 2: Make Firefox Account Android Account type unique per package. r=rnewman, a=sylvestre

This bumps every package's account type so that any issues shake out on
Nightly (which otherwise would not have experienced an account type
change).

The trivial change to the AndroidManifest is to ensure that the new
Account type is picked up by the build system, in the hopes of avoiding
a clobber.

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extra : source : 8c483fd63cadc80a8ac9b21acac8030757225bbc