[android] Cancel other gestures during shove.

This adds a guard so that when a shove gesture is occurring, no other
gestures take place. This helps avoid the disorienting feeling of
having the map move left and right and rotate while trying to tilt it
and looks more like Google maps.

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/MapView.java

@@ -142,6 +142,7 @@ public class MapView extends FrameLayout {
     private ShoveGestureDetector mShoveGestureDetector;
     private boolean mTwoTap = false;
     private boolean mZoomStarted = false;
+    private boolean mDragStarted = false;
     private boolean mQuickZoom = false;
     private boolean mScrollInProgress = false;
 
@@ -1746,6 +1747,10 @@ public class MapView extends FrameLayout {
                 return false;
             }
 
+            if (mDragStarted) {
+                return false;
+            }
+
             // reset tracking modes if gesture occurs
             resetTrackingModesIfRequired();
 
@@ -1820,6 +1825,10 @@ public class MapView extends FrameLayout {
                 return false;
             }
 
+            if (mDragStarted) {
+                return false;
+            }
+
             // Cancel any animation
             mNativeMapView.cancelTransitions();
 
@@ -1885,10 +1894,14 @@ public class MapView extends FrameLayout {
                 return false;
             }
 
+            if (mDragStarted) {
+                return false;
+            }
+
             // If rotate is large enough ignore a tap
             // Also is zoom already started, don't rotate
             mTotalAngle += detector.getRotationDegreesDelta();
-            if (!mZoomStarted && ((mTotalAngle > 10.0f) || (mTotalAngle < -10.0f))) {
+            if (!mZoomStarted && ((mTotalAngle > 20.0f) || (mTotalAngle < -20.0f))) {
                 mStarted = true;
             }
 
@@ -1954,6 +1967,7 @@ public class MapView extends FrameLayout {
             mBeginTime = 0;
             mTotalDelta = 0.0f;
             mStarted = false;
+            mDragStarted = false;
         }
 
         @Override
@@ -1992,6 +2006,8 @@ public class MapView extends FrameLayout {
             // Tilt the map
             mMapboxMap.setTilt(pitch);
 
+            mDragStarted = true;
+
             return true;
         }
     }