[Safer intents] App Time Spent Preference

Set package com.android.internal.R.string.config_systemWellbeing to the
intent.

Fix: 356117796
Flag: EXEMPT bug fix
Test: manual - on App info
Test: atest AppTimeSpentPreferenceTest
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:a9135aaddab390dec71126cd4898e612fce88987)
Merged-In: I2af7b53a75fe5c6915dd9781406039822789c18c
Change-Id: I2af7b53a75fe5c6915dd9781406039822789c18c