Please add support for M4As in Adobe Premiere Clip (Android).. I know this app is just "fresh out the oven" but it seems like a basic thing to do.. The popularity of m4a is growing and is on the verge of completely replacing mp3.. It's lossless and offers a higher bit rate for an exceptionally smaller-sized file (compared to mp3 that can reach up to 15 MB for typical music).
If the m4a is Itunes they are protected files.