Added `env()->ExceptionClear()` everywhere before throwing NameResolutionException

[hacker-cb]

Uncleared exceptions cause SegFault on Android.

Android developer docs:You must not call most JNI functions while an exception is pending.

[rpavlik]

I wonder if there is a way to add a test for this. I guess we would have to throw a JNI exception that wouldn't be handled by jnipp?