Export ASensor_getHandle

Bug: 122366555
Test: Verified ASensor_getHandle is available to NDK clients in
      libandroid and the function returns the correct handle.

Change-Id: Ib08fbcc6862d3d3d4906a457d7708cb600dd161c

native/android/libandroid.map.txt

@@ -185,6 +185,7 @@ LIBANDROID {
     ASensorManager_getSensorList;
     ASensor_getFifoMaxEventCount; # introduced=21
     ASensor_getFifoReservedEventCount; # introduced=21
+    ASensor_getHandle; # introduced=29
     ASensor_getHighestDirectReportRateLevel; # introduced=26
     ASensor_getMinDelay;
     ASensor_getName;