Pinch gesture can escape delegate-limited bounds

[friedbunny]

Platform: iOS
Mapbox SDK version: 3.7.4, 3.7.5

Steps to trigger behavior

1. Try to limit the user’s ability to move outside a coordinate bounds with -[MGLMapViewDelegate mapView:shouldChangeFromCamera:toCamera:], as with this example.
2. Pinch zoom, such that it triggers inertial deceleration.

Expected behavior

Map is limited to specified coordinate bounds.

Actual behavior

User can break out of limited bounds with a pinch gesture that decelerates beyond said bounds. Once beyond the bounds, the deceleration movement for pinch gestures continues to work but the initial pinch is blocked.

Notes

• Bisects back to 9ee99c9 (Adds reason parameter to camera change delegate methods and add single tap method.  #11151), so this was a regression in ios-v3.7.4.
• Pan deceleration stops at bounds, as expected.
• This issue does not exist when MGLMapView.decelerationRate is set to MGLMapViewDecelerationRateImmediate (i.e., disabling gesture deceleration).

/cc @julianrex

[friedbunny]

Fixed by #11423, will be in the forthcoming ios-v3.7.6 release.