feat:2995: Add hidden debug activity

Description

Some features will execute just weekly. It's not handy for debugging. To allow easier debuging and firsts steps of NRT on these features, this MR add a debug Activity. This activity will be upgraded will debug views over time. This debug activity is only accessible through accessible through Explicit Intent, for example using adb command:

adb shell am start -n foundation.e.advancedprivacy/.features.debug.AdvancedPrivacyDebugActivity

Tests

Install the app, and run :

adb shell am start -n foundation.e.advancedprivacy/.features.debug.AdvancedPrivacyDebugActivity

An activity with label "AdvancedPrivacy debug tools" should popup.

Issues

https://gitlab.e.foundation/e/os/backlog/-/issues/2995

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