The app uses the same icon for presentations (ODP) as graphics
(ODG), which is a bit confusing.
I can confirm this issue. Let me add this only happens in the grid view.
AlexF committed a patch related to this issue.
It has been pushed to "master":
tdf#88391 android document browser: draw and impress icon is the same
It will be available in 5.2.0.
The patch should be included in the daily builds available at
http://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More
information about daily builds can be found at:
Affected users are encouraged to test the fix and report feedback.