This lets SDL-based apps respond to "Open With" commands properly, as they
can now obtain the requested path via a standard SDL dropfile event.
This is only checked on startup, so apps don't get drop events at any other
time, even if Android supports that, but this is still a definite
improvement.
Fixes Bugzilla #2762.
According to the documentation of Android's MotionEvent, the getPressure() may
return values higher than 1 on some devices. To prevent passing such values into
SDL they are now corrected to 1 in Java before the JNI call (where it is assumed
to be correct).
Currently SDL only sends SDL_FINGERMOTION events if the touch state (position or
pressure) changed. By correcting pressure down to 1 some events may get dropped
in the rare case that only the pressure was changed but was out of range and the
position did not change.
An existing hint lets apps that don't need the timer resolution changed avoid
this, to save battery, etc, but this fixes several problems in timing, audio
callbacks not firing fast enough, etc.
Fixes Bugzilla #2944.
