Load resources from the correct profile

In the window decor resource loader, instead of getting the package
manager from the current user, get the one from the profile running the
app, so we always have access to the correct package.

Fix: 388824382
Flag: EXEMPT bug fix
Test: atest UserProfileContextsTest
Test: atest WindowDecorTaskResourceLoaderTest
Change-Id: I5b2aff386d8683772d998951bbabcf1f702c0c2f