Actually enable the auto focus for video call in Android #4
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…or video call in Android
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Although there is
activateAutoFocusfunction inAndroidVideoApi5JniWrapper.java, it is never used. More importantly callingcamera.autoFocus(null)inactivateAutoFocusactually will only trigger the camera to focus once.In order to make the camera continuously auto focus during a video call, need to explicitly set the parameter.