Fetch package uid under the corresponding user handle.

- Make 3p-app usage entry under work profile selectable:
[Before] https://screenshot.googleplex.com/AuD3Q8hrepmxaoS
[After]  https://screenshot.googleplex.com/ACrXLcV2RYYv9aA

Bug: 346982931
Fix: 346982931
Test: atest BatteryDiffEntryTest
Flag: EXEMPT bug fix
Change-Id: Ib54df4c6d343dd32057e741b448596357ec2c12f