Try to fix dumpsys command

[vvb2060]

The dumpsys command does not work with root.
Device: Nexus 6P Stock ROM 7.1.2-N2G47O

[liudongmiao]

Suggest to squash to one commit.

[aviraxp]

@topjohnwu Sorry to pin you here, but we need to get this work. Any status on this?

[liudongmiao]

@topjohnwu It's a problem like this.

Brevent requires some result for dumpsys.
For example, dumpsys notification, dumpsys activity activities.

However, in MagiskSu, dumpsys doesn't work.
You can check it with dumpsys battery (maybe the shortest output if success).

Brevent requires this, and I think other apps may need this

[liudongmiao]

@topjohnwu

Are you so busy, without any response in 2 month?
Fix, or not fix, without any word?

[ted-dev-42]

@topjohnwu
please merge this fix ASAP, thanks.