do not build testing binaries for Android libs (#1126)

Author: farindk

scripts/build-android-libs.sh

@@ -42,6 +42,7 @@ function build {
 	  -DANDROID_PLATFORM=android-${ANDROID_VERSION} \
 	  -DANDROID_TOOLCHAIN=${TOOLCHAIN} \
     	  -DENABLE_PLUGIN_LOADING=OFF \
+	  -DBUILD_TESTING=OFF \
 	  -DWITH_AOM_DECODER=OFF \
 	  -DWITH_AOM_DECODER_PLUGIN=OFF \
 	  -DWITH_AOM_ENCODER=OFF \