Fix TTS breakage

bug:4476001
Change-Id: I14f4c5d803fc95bcaf11bc3ac182df4133083281
diff --git a/pico/Android.mk b/pico/Android.mk
index 4521b70..16c38d3 100755
--- a/pico/Android.mk
+++ b/pico/Android.mk
@@ -54,8 +54,6 @@
 LOCAL_PATH:= $(TOP_LOCAL_PATH)/tts
 include $(CLEAR_VARS)
 
-LOCAL_MODULE_TAGS := optional
-
 LOCAL_SRC_FILES:= com_svox_picottsengine.cpp svox_ssml_parser.cpp
 LOCAL_C_INCLUDES += \
 	external/svox/pico/lib \