Allow certificates to be stored in the carrier app whitelist

Use CARRIER_APP_WHITELIST to store app certificate mapped to package
name (instead of just package name as we had before).

Bug: 70042722
Test: SettingsBackupTest
Test: UiccProfileTest#testParseWhitelistMapFromString() for parsing map
Change-Id: Ia0c7c364cd8154272ef62cbbf412036b4eae1b21

telephony/java/android/telephony/UiccAccessRule.java

@@ -156,6 +156,13 @@ public final class UiccAccessRule implements Parcelable {
         return mPackageName;
     }
 
+    /**
+     * Returns the hex string of the certificate hash.
+     */
+    public String getCertificateHexString() {
+        return IccUtils.bytesToHexString(mCertificateHash);
+    }
+
     /**
      * Returns the carrier privilege status associated with the given package.
      *