Add Gallery3D in all builds.

Bug: 2546464
Change-Id: I110de0fe56bcc7128f490b3ed516637786777773
diff --git a/target/product/generic.mk b/target/product/generic.mk
index 95596d7..61b6dd5 100644
--- a/target/product/generic.mk
+++ b/target/product/generic.mk
@@ -29,6 +29,7 @@
     CertInstaller \
     DrmProvider \
     Email \
+    Gallery3D \
     LatinIME \
     Launcher2 \
     Mms \