Camera: Fix off-by-one error during clamping in distortion mapper

The (right, bottom) coordinates of any input rectangles are
exclusive.

Bug: 111885753
Test: Camera CTS,
adb shell /data/nativetest64/cameraservice_test/cameraservice_test
--gtest_filter=DistortionMapperTest.*
Change-Id: Ied956bd154256a10fc4c81d27c93b0ba2e33044d