Fix UnsupportedOperationException

Arrays.asList() returns a fixed-size list and an UnsupportedOperationException will be thrown if `remove(element)` is called on it.

Change-Id: I1afae70422a8592f7c255d3ac8f16d53f3b8639e
BUG: 276395232
Test: builds

services/core/java/com/android/server/pm/VerifyingSession.java

@@ -361,7 +361,8 @@ final class VerifyingSession {
         }
         final int verifierUserId = verifierUser.getIdentifier();
 
-        List<String> requiredVerifierPackages = Arrays.asList(mPm.mRequiredVerifierPackages);
+        List<String> requiredVerifierPackages = new ArrayList<>(
+                Arrays.asList(mPm.mRequiredVerifierPackages));
         boolean requiredVerifierPackagesOverridden = false;
 
         // Allow verifier override for ADB installations which could already be unverified using