Replace PackageParser.SigningDetails by the independent one in order
to move away from PackageParser.
Bug: 174723245
Test: atest -p core/java/android/content/pm \
core/java/com/android/internal/content \
services/core/java/com/android/server/pm \
services/tests/servicestests/src/com/android/server/pm
Change-Id: I5e22dd877072a668583ac37fd6901985625e44ad
a989d2ec76