Fix wrong matcher for PackageSetting.keySetData

The copy constructor of PackageSetting is using
`new PacakgeKeySetData(other.keySetData)` in copyPackageSetting
function. The current test compare the expected result by comparing
reference. It should compare the expected result by comparing
the individual private member fields in PackageKeySetData.
* mProperSigningKeySet
* mUpgradeKeySets
* mKeySetAliases

Fixes: 206929914

Test: TP="FrameworksServicesTests"; atest \
    ${TP}:com.android.server.pm.PackageManagerSettingsTests
Change-Id: I993be33b10dfe0483ca4c3b874a49c5f1fdae41d