src: use `get_annotations` instead of `collect_annotations_by_name`

The former does what is implied, the second is a deep search

Update the comment on the latter.

Signed-off-by: Jean Privat <jean@pryen.org>
android_annotations: add a FIXME about the lookup of annotations

Signed-off-by: Jean Privat <jean@pryen.org>
shoot&freindz: move app_* annotations to the android module

Thus avoiding warnings when the antrodic platform is not used.

Signed-off-by: Jean Privat <jean@pryen.org>