Add dump to Input Classifier

Currently, the InputClassifier stage that is positioned between
InputReader and InputDispatcher is not accounted for when doing a
'dumpsys input'. But that stage may contain important information about
the operation and the InputClassifier HAL. Add the dump(..) command to
both InputClassifier and MotionClassifier.

Test: dumpsys input and inspect the resulting text
Next, crash the InputClassifier HAL (killall android.hardware.input.classifier@1.0-service
Then again 'dumpsys input' to check that the HAL status is 'not
responding'
Bug: 117935272
Change-Id: Ie7ddca2e355e094f93236a9bc667faad7a99ee70
diff --git a/services/inputflinger/InputManager.h b/services/inputflinger/InputManager.h
index 142ec0c..e632da3 100644
--- a/services/inputflinger/InputManager.h
+++ b/services/inputflinger/InputManager.h
@@ -90,6 +90,7 @@
     virtual status_t stop();
 
     virtual sp<InputReaderInterface> getReader();
+    virtual sp<InputClassifierInterface> getClassifier();
     virtual sp<InputDispatcherInterface> getDispatcher();
 
     virtual void setInputWindows(const Vector<InputWindowInfo>& handles);