IMPROVEMENT: Add new checks to microG self check

[ale5000-git]

@mar-v-in Please add new checks to microG self check (but only if detect microG Companion and not Play Store).

1. These permissions are requested from microG Companion:

org.microg.gms.permission.READ_SETTINGS
com.google.android.gms.permission.READ_SETTINGS

If not, then suggest to update microG Companion.

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2. These permissions are granted to microG Companion:

org.microg.gms.permission.READ_SETTINGS
com.google.android.gms.permission.READ_SETTINGS

If not, then suggest to reinstall microG Companion and check that it has the same signature of microG Service.

It will help with issues like this: #2333