TouchMode (4.1/n) JNI onTouchModeChanged registering

Bug: 193718270
Test: atest inputflinger_tests
Test: atest inputflinger_tests:InputDispatcherTouchModeChangedTest
Test: atest CtsInputTestCases:android.input.cts.VerifyHardwareKeyEventTest
Test: atest CtsInputTestCases:android.input.cts.InputShellCommandTest
Test: atest CtsInputTestCases
Test: atest CtsSecurityTestCases:android.security.cts.MotionEventTest
Test: atest CtsSecurityTestCases
Test: atest CtsWindowManagerDeviceTestCases:android.server.wm.WindowInputTest
Test: atest CtsWindowManagerDeviceTestCases
Change-Id: I2846797a5e2fb1ee52ddd7193ada3db44f6305cd