Exclude MTP implementation from simulator build

Change-Id: I93364c74c26ba6e2bf6b08f1bd82802b966c8dfb
Signed-off-by: Mike Lockwood <lockwood@android.com>
diff --git a/media/mtp/Android.mk b/media/mtp/Android.mk
index 4659709..40adf18 100644
--- a/media/mtp/Android.mk
+++ b/media/mtp/Android.mk
@@ -13,6 +13,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
+
+ifneq ($(TARGET_SIMULATOR),true)
+
 LOCAL_PATH:= $(call my-dir)
 
 include $(CLEAR_VARS)
@@ -41,3 +44,5 @@
 LOCAL_CFLAGS := -DMTP_DEVICE -DMTP_HOST
 
 include $(BUILD_STATIC_LIBRARY)
+
+endif