NIU Actions: Add privacy confirmation dialog

This adds a dialog to inform the user that the NIU Actions buttons need to send data to Google in order to function. The user can accept or reject this. The dialog will block use of the feature until the user accepts.

Bug: 191818216
Test: Manual (Pixel 3A with multiple user profiles)
Test: m -j RunLauncherGoGoogleRoboTests
Change-Id: Iedd056ce239de5269d02a31d28a9778efae34ede
9 files changed