[Feature Request] Need "Select/Deselect All" option in "Choose Apps" screen

**Is your feature request related to a problem? Please describe.**
When choosing apps, if someone wants to choose the majority of apps and opt-out some of them, he/she has to go through almost all the app list and select almost all of them.

**Describe the Solution You'd Like**
Add a checkbox to select all the apps so that the user can deselect some.

**Describe the Alternatives You've Considered**
N/A

**Additional Context**

Start by locating the Android "Choose Apps" screen and reading how its current app-selection state is displayed and updated. Add a select-all checkbox that selects every listed app while still allowing individual apps to be deselected; done means the screen supports choosing the majority of apps without manual selection of each one.

Written by the indexing model from the issue text.