Add getEmergencyRoleHolder SystemApi to RoleManager.

This API then enables TelephonyManager to expose the emergency
role holder to priviliged clients via getEmergencyAssistancePackageName.

Bug: 323157319
Test: atest RoleManagerTest
LOW_COVERAGE_REASON=Flagged test added but flag not enabled

Change-Id: I91089701248a32a720b488147405b2566cca2be9

2 files changed, 24 insertions, 0 deletions

diff --git a/framework-s/java/android/app/role/IRoleManager.aidl b/framework-s/java/android/app/role/IRoleManager.aidl
index 0aef871e6..522967630 100644
--- a/framework-s/java/android/app/role/IRoleManager.aidl
+++ b/framework-s/java/android/app/role/IRoleManager.aidl
@@ -74,6 +74,8 @@ interface IRoleManager {
 
     String getSmsRoleHolder(int userId);
 
+    String getEmergencyRoleHolder(int userId);
+
     boolean isRoleVisibleAsUser(in String roleName, int userId);
 
     boolean isApplicationVisibleForRoleAsUser(in String roleName, in String packageName,
diff --git a/framework-s/java/android/app/role/RoleManager.java b/framework-s/java/android/app/role/RoleManager.java
index fe27d50f3..4b8c9b388 100644
--- a/framework-s/java/android/app/role/RoleManager.java
+++ b/framework-s/java/android/app/role/RoleManager.java
@@ -975,6 +975,28 @@ public final class RoleManager {
     }
 
     /**
+     * Allows getting the role holder for {@link #ROLE_EMERGENCY} without requiring
+     * {@link Manifest.permission#OBSERVE_ROLE_HOLDERS}.
+     *
+     * @param userId the user ID to get the default emergency package for
+     * @return the package name of the default emergency app, or {@code null} if none
+     *
+     * @hide
+     */
+    @FlaggedApi(Flags.FLAG_GET_EMERGENCY_ROLE_HOLDER_API_ENABLED)
+    @RequiresApi(Build.VERSION_CODES.VANILLA_ICE_CREAM)
+    @RequiresPermission(Manifest.permission.READ_PRIVILEGED_PHONE_STATE)
+    @Nullable
+    @SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
+    public String getEmergencyRoleHolder(@UserIdInt int userId) {
+        try {
+            return mService.getEmergencyRoleHolder(userId);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
      * Check whether a role should be visible to user.
      *
      * @param roleName name of the role to check for