Merge "Break flings with opposing velocities" into jb-mr1-dev

        case MotionEvent.ACTION_POINTER_UP:

            mDownFocusX = mLastFocusX = focusX;

            mDownFocusY = mLastFocusY = focusY;

            // Check the dot product of current velocities.

            // If the pointer that left was opposing another velocity vector, clear.

            mVelocityTracker.computeCurrentVelocity(1000, mMaximumFlingVelocity);

            final int upIndex = ev.getActionIndex();

            final int id1 = ev.getPointerId(upIndex);

            final float x1 = mVelocityTracker.getXVelocity(id1);

            final float y1 = mVelocityTracker.getYVelocity(id1);

            for (int i = 0; i < count; i++) {

                if (i == upIndex) continue;

                final int id2 = ev.getPointerId(i);

                final float x = x1 * mVelocityTracker.getXVelocity(id2);

                final float y = y1 * mVelocityTracker.getYVelocity(id2);

                final float dot = x + y;

                if (dot < 0) {

                    mVelocityTracker.clear();

                    break;

                }

            }

            break;

        case MotionEvent.ACTION_DOWN: