Implement rowsAffected for Android < 11

Implements rowsAffected using a pretty basic
regex + extra SELECT query strategy. It's not
perfect, but it passes a pretty impressive suite
of unit tests, and the query it executes is
wrapped in a try/catch, so it's better than nothing.

With this commit, the test suite now passes 100% on Android 2.3, Android 4.4, and iOS 7.

And yeah, this is on top of my three other PRs, to avoid bitrotting myself. :)