This change addresses the launch of entitlement UI activities
in Headless System User Mode (HSUM) on multi-user devices.
HSUM is a configuration where the system user (user 0) does
not represent a human user and primarily runs system services.
In this mode, the first user set up on the device is not user 0.
Modified the EntitlementManager logic to handle the
launch of the entitlement UI in multi-user environments,
specifically addressing scenarios where HSUM is enabled, which
includes:
1. Always launch the UI to the foreground current user.
2. Check whether the current user is allowed to show the UI.
This ensures the UI is presented to the appropriate user.
Test: Manual
1. Mock requires entitlement
2. adb shell cmd user set-system-user-mode-emulation headless
3. enable hotspot
Test: atest TetheringTests:EntitlementManagerTest
Fix: 363972541
Change-Id: I950d678741a3f1714f347206fa161bcd7538b402
b4a92ff791