Correct testdpc:admin usage

Fix a crash due to bug introduced by a previous CL to make TestDPC
delegation-aware.

Test: manual, TestDPC can start as DO
Bug: 112982695
Change-Id: I452faac9fdcc061d5281a6d260a6dd2cf62a95c6

Author: Rubin Xu

app/src/main/res/xml/device_policy_header.xml

@@ -169,7 +169,7 @@
         <com.afwsamples.testdpc.common.preference.DpcPreference
             android:key="generic_delegation"
             android:title="@string/generic_delegation"
-            testdpc:admin="none"
+            testdpc:admin="any"
             testdpc:minSdkVersion="O" />
     </PreferenceCategory>
 
@@ -236,7 +236,7 @@
             android:key="test_key_usability"
             android:title="@string/test_key_usage"
             testdpc:minSdkVersion="L"
-            testdpc:admin="none" />
+            testdpc:admin="any" />
         <com.afwsamples.testdpc.common.preference.DpcPreference
             android:key="install_ca_certificate"
             android:title="@string/install_ca_certificate"