Enable Canadian English on L10n builds

Bug: 64491256
Test: mmma -j packages/apps/Settings (and checking the APK using aapt dump badging)
Change-Id: I1108802a89bd82ccc6e2cc0c2464b8e30eb796b4
diff --git a/target/product/languages_full.mk b/target/product/languages_full.mk
index 8cfe68a..846cd70 100644
--- a/target/product/languages_full.mk
+++ b/target/product/languages_full.mk
@@ -34,6 +34,7 @@
         de_DE \
         el_GR \
         en_AU \
+        en_CA \
         en_GB \
         en_IN \
         en_XA \