Fix NameNotFoundException documentation

Changed the wording of the NameNotfoundException documentation to be
more inclusive of other potential cases where the exception could be
thrown (such as a lack of permissions) in PackageManager methods that
query packge info.

Bug: 216062232
Test: Only making documenation changes
Change-Id: I07206b40cf33686fe842d21a624582da686c2f03
1 file changed