148e31d70c
The method returns names of the packages that have access to the key grouped by UID since grants are stored on per-uid basis. This is expressed as Set<Set<String>> Since Binder currently doesn't support sets or lists of lists, this data structure is flattened into a list of strings, with null values used as a delimiter. Bug: 160457441 Test: atest com.android.cts.devicepolicy.MixedManagedProfileOwnerTest#testKeyManagement Test: atest com.android.cts.devicepolicy.MixedDeviceOwnerTest#testDelegatedCertInstallerDirectly Test: atest android.admin.cts.DevicePolicyManagerTest Change-Id: Ieee1048b145fb8400eccbf32c054afc64b5d90c0