On screen timeout, application only receives onPause, breaking Android contract

[mcomella]

STR:

• Add log statements to onPause, onStop, and onDestroy
• Open Firefox on device
• Wait 5 minutes for device to time out

Expected: onPause and onStop are called, as per the contracts defined by the Android lifecycle
Actual: only onPause is called

I suspect Fire OS may be doing this intentionally to prevent Android from restoring state to Firefox when it's reopened but we actually think that's desirable behavior #145. Also, diverging from Android and breaking this contract makes it harder to write reliable apps.

@athomasmoz Can we ask Amazon if this intentional and if so why they're doing this? I'd like the behavior to be consistent with Android but if it's necessary to break with convention, I'd like to understand the consequences.