Themes: Include aapt on device

Change-Id: I123ba9519dd8c3f31582f0847de31939bdf6ac04
diff --git a/config/themes_common.mk b/config/themes_common.mk
index 30b14d8..c3bcfa9 100644
--- a/config/themes_common.mk
+++ b/config/themes_common.mk
@@ -1,5 +1,6 @@
 # Theme engine
 PRODUCT_PACKAGES += \
+    aapt \
     ThemeChooser \
     ThemesProvider