I'd kill to find something as good as PDF Expert on iOS for Android.
Bit out of my price range anyways haha
Google Drive app offers to open PDFs for me and it works fine. It's an app I already use, so that's convenient. It has search and you can draw on a file and highlight stuff then save a copy. No real editing, though.
MJ PDF os good and FOSS.
I like MJ PDF its also kind of minimal compared to other readers.