Add SensorManager support in inputflinger.

Add sensor device, sensor input mapper, sens event dispatcher support
into inputflinger.

Bug: 161634265
Test: atest inputflinger_tests

Change-Id: I2dcb2c35d9dccefc4cd8d939b79cf340931a9410
diff --git a/include/input/KeyCharacterMap.h b/include/input/KeyCharacterMap.h
index 23f8ddf..451ca3c 100644
--- a/include/input/KeyCharacterMap.h
+++ b/include/input/KeyCharacterMap.h
@@ -142,6 +142,8 @@
     void writeToParcel(Parcel* parcel) const;
 #endif
 
+    bool operator==(const KeyCharacterMap& other) const;
+
     KeyCharacterMap(const KeyCharacterMap& other);
 
     virtual ~KeyCharacterMap();