DevicePolicyManager: make 3 hidden provisioning methods system API.

In order to unbundle OobConfig app, make the following
methods @SystemAPI:
- DevicePolicyManager#isDeviceProvisioned
- DevicePolicyManager#setDeviceProvisioningConfigApplied
- DevicePolicyManager#isDeviceProvisioningConfigApplied

Test: gts-tradefed run gts -m GtsGmscoreHostTestCases --test com.google.android.gts.devicepolicy.DevicePolicyManagerTest

Bug: 32972931

Change-Id: Ic33b6c570222e4aa31cf7975a39de0d9e2614534

api/system-current.txt

@@ -6280,6 +6280,8 @@ package android.app.admin {
     method public boolean isCallerApplicationRestrictionsManagingPackage();
     method public boolean isDeviceManaged();
     method public boolean isDeviceOwnerApp(java.lang.String);
+    method public boolean isDeviceProvisioned();
+    method public boolean isDeviceProvisioningConfigApplied();
     method public boolean isLockTaskPermitted(java.lang.String);
     method public boolean isManagedProfile(android.content.ComponentName);
     method public boolean isMasterVolumeMuted(android.content.ComponentName);
@@ -6315,6 +6317,7 @@ package android.app.admin {
     method public void setCrossProfileCallerIdDisabled(android.content.ComponentName, boolean);
     method public void setCrossProfileContactsSearchDisabled(android.content.ComponentName, boolean);
     method public void setDeviceOwnerLockScreenInfo(android.content.ComponentName, java.lang.CharSequence);
+    method public void setDeviceProvisioningConfigApplied();
     method public void setGlobalSetting(android.content.ComponentName, java.lang.String, java.lang.String);
     method public boolean setKeyguardDisabled(android.content.ComponentName, boolean);
     method public void setKeyguardDisabledFeatures(android.content.ComponentName, int);

core/java/android/app/admin/DevicePolicyManager.java

@@ -6827,10 +6827,13 @@ public class DevicePolicyManager {
     }
 
     /**
+     * Returns whether the device has been provisioned.
+     *
+     * <p>Not for use by third-party applications.
+     *
      * @hide
-     * @return whether {@link android.provider.Settings.Global#DEVICE_PROVISIONED} has ever been set
-     * to 1.
      */
+    @SystemApi
     public boolean isDeviceProvisioned() {
         try {
             return mService.isDeviceProvisioned();
@@ -6840,9 +6843,16 @@ public class DevicePolicyManager {
     }
 
     /**
-     * @hide
-     * Writes that the provisioning configuration has been applied.
-     */
+      * Writes that the provisioning configuration has been applied.
+      *
+      * <p>The caller must hold the {@link android.Manifest.permission#MANAGE_USERS}
+      * permission.
+      *
+      * <p>Not for use by third-party applications.
+      *
+      * @hide
+      */
+    @SystemApi
     public void setDeviceProvisioningConfigApplied() {
         try {
             mService.setDeviceProvisioningConfigApplied();
@@ -6852,9 +6862,17 @@ public class DevicePolicyManager {
     }
 
     /**
-     * @hide
+     * Returns whether the provisioning configuration has been applied.
+     *
+     * <p>The caller must hold the {@link android.Manifest.permission#MANAGE_USERS} permission.
+     *
+     * <p>Not for use by third-party applications.
+     *
      * @return whether the provisioning configuration has been applied.
+     *
+     * @hide
      */
+    @SystemApi
     public boolean isDeviceProvisioningConfigApplied() {
         try {
             return mService.isDeviceProvisioningConfigApplied();