Because android is a google run product/service and it is possible that our government could force google's hand into using it's presumed ability to compromise the security of an Android device via some custom patched system update or something that normally only google would have control over.

Because our government may not have that same level of access/power over whatever the Chinese version of Android is.

how can the government not do the same to Apple's iOS or blackberry or any other?

Being Canadian, Blackberry isn't on the same level. But yes, clearly iOS is transparent to the NSA.

It's not a flamewar starter, it's using specific examples for a directed point (hence MasterCard and not credit card, Facebook photos rather than photos from any other cloud provider etc...)

Correct, I was just using a narrative technique, not implying any brands are more susceptible than others.