Apache License Details

Are they allowed when I distribute them as internal apps?

App name change
change icon
Application ID change

Describe those changes in Notice and build

I suggest you try to read the Apache license to answer your questions. I find it’s not that difficult to understand if you put some effort into it. If you do need a summary, check out Apache License 2.0 (Apache-2.0) Explained in Plain English - TLDRLegal

You are allowed to distribute modified versions of the app, even publicly. However, you’re not allowed to use our trademarks, e.g. the names “K-9 Mail” or “Thunderbird”, or the app logo.
I would highly recommend changing the application ID. If you distribute your modified app via Google Play, you even have to use a different application ID because they won’t allow you to use ours.

Simple question due to translation issues

Planning apk distribution via MDM as an in-house app

Are we allowed to:
・Icon change
・Application ID change
・Change application name

Not all questions have simple answers. I suggest you find someone who can translate for you.