Clarified CrossProfileApps API and documentation.

Changed CrossProfileApps#startAnyActivity to #startAcitivty.

Updated documentation for the usage of startActivity vs startMainActivity.
Also clarified that the INTERACT_ACROSS_PROFILES permission is a two-way
channel between personal and managed profiles.

Bug: 122886462
Test: n/a (documentation changes only)
Change-Id: I67772aef0cf24110432a2dbde0f87c91354fd4a0
diff --git a/api/system-current.txt b/api/system-current.txt
index 891e764..ffb8f30 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -1134,7 +1134,7 @@
   }
 
   public class CrossProfileApps {
-    method public void startAnyActivity(android.content.ComponentName, android.os.UserHandle);
+    method public void startActivity(android.content.ComponentName, android.os.UserHandle);
   }
 
   public final class InstantAppInfo implements android.os.Parcelable {
diff --git a/core/java/android/content/pm/CrossProfileApps.java b/core/java/android/content/pm/CrossProfileApps.java
index 740fd7f..b7366f1 100644
--- a/core/java/android/content/pm/CrossProfileApps.java
+++ b/core/java/android/content/pm/CrossProfileApps.java
@@ -18,6 +18,7 @@
 import android.annotation.NonNull;
 import android.annotation.RequiresPermission;
 import android.annotation.SystemApi;
+import android.annotation.UnsupportedAppUsage;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.res.Resources;
@@ -76,9 +77,23 @@
     }
 
     /**
-     * Starts the specified activity of the caller package in the specified profile if the caller
-     * has {@link android.Manifest.permission#INTERACT_ACROSS_PROFILES} permission and
-     * both the caller and target user profiles are in the same user group.
+     * @deprecated use {@link #startActivity(ComponentName, UserHandle)} instead.
+     *
+     * @removed
+     * @hide
+     */
+    @Deprecated
+    @UnsupportedAppUsage
+    public void startAnyActivity(@NonNull ComponentName component, @NonNull UserHandle targetUser) {
+        startActivity(component, targetUser);
+    }
+
+    /**
+     * Starts the specified activity of the caller package in the specified profile. Unlike
+     * {@link #startMainActivity}, this can start any activity of the caller package, not just
+     * the main activity.
+     * The caller must have the {@link android.Manifest.permission#INTERACT_ACROSS_PROFILES}
+     * permission and both the caller and target user profiles must be in the same profile group.
      *
      * @param component The ComponentName of the activity to launch. It must be exported.
      * @param targetUser The UserHandle of the profile, must be one of the users returned by
@@ -88,7 +103,7 @@
      */
     @SystemApi
     @RequiresPermission(android.Manifest.permission.INTERACT_ACROSS_PROFILES)
-    public void startAnyActivity(@NonNull ComponentName component, @NonNull UserHandle targetUser) {
+    public void startActivity(@NonNull ComponentName component, @NonNull UserHandle targetUser) {
         try {
             mService.startActivityAsUser(mContext.getIApplicationThread(),
                     mContext.getPackageName(), component, targetUser.getIdentifier(), false);
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index 449a7b3..dd48670 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -2208,8 +2208,9 @@
     <permission android:name="android.permission.INTERACT_ACROSS_USERS_FULL"
         android:protectionLevel="signature|installer" />
 
-    <!-- @SystemApi Allows an application to start an activity within its managed profile from
-         the personal profile.
+    <!-- @SystemApi Allows an application to start its own activities, but on a different profile
+         associated with the user. For example, an application running on the main profile of a user
+         can start an activity on a managed profile of that user.
          This permission is not available to third party applications.
          @hide -->
     <permission android:name="android.permission.INTERACT_ACROSS_PROFILES"