Adds EXTRA_METADATA_TEXT field to Intent

This change is guarded by android.service.chooser.Flags.FLAG_ENABLE_SHARESHEET_METADATA_EXTRA.

Test: existing tests pass
BUG: 318942069
BUG: 324573482
Change-Id: Ice62c69c0e1a09fc545d8ee3a7340c58b87a2ae9

core/api/current.txt

diff --git a/core/api/current.txt b/core/api/current.txt
index 321d35d..b676d43 100644
--- a/core/api/current.txt
+++ b/core/api/current.txt
@@ -11309,6 +11309,7 @@
     field public static final String EXTRA_LOCALE_LIST = "android.intent.extra.LOCALE_LIST";
     field public static final String EXTRA_LOCAL_ONLY = "android.intent.extra.LOCAL_ONLY";
     field public static final String EXTRA_LOCUS_ID = "android.intent.extra.LOCUS_ID";
+    field @FlaggedApi("android.service.chooser.enable_sharesheet_metadata_extra") public static final String EXTRA_METADATA_TEXT = "android.intent.extra.METADATA_TEXT";
     field public static final String EXTRA_MIME_TYPES = "android.intent.extra.MIME_TYPES";
     field public static final String EXTRA_NOT_UNKNOWN_SOURCE = "android.intent.extra.NOT_UNKNOWN_SOURCE";
     field public static final String EXTRA_ORIGINATING_URI = "android.intent.extra.ORIGINATING_URI";

core/java/android/content/Intent.java

diff --git a/core/java/android/content/Intent.java b/core/java/android/content/Intent.java
index 08871d4..333c363 100644
--- a/core/java/android/content/Intent.java
+++ b/core/java/android/content/Intent.java
@@ -19,6 +19,7 @@
 import static android.app.sdksandbox.SdkSandboxManager.ACTION_START_SANDBOXED_ACTIVITY;
 import static android.content.ContentProvider.maybeAddUserId;
 import static android.os.Flags.FLAG_ALLOW_PRIVATE_PROFILE;
+import static android.service.chooser.Flags.FLAG_ENABLE_SHARESHEET_METADATA_EXTRA;
 
 import android.Manifest;
 import android.accessibilityservice.AccessibilityService;
@@ -6156,6 +6157,17 @@
     public static final String EXTRA_INITIAL_INTENTS = "android.intent.extra.INITIAL_INTENTS";
 
     /**
+     * A CharSequence of additional text describing the content being shared. This text will be
+     * displayed to the user as a part of the sharesheet when included in an
+     * {@link #ACTION_CHOOSER} {@link Intent}.
+     *
+     * <p>e.g. When sharing a photo, metadata could inform the user that location data is included
+     * in the photo they are sharing.</p>
+     */
+    @FlaggedApi(FLAG_ENABLE_SHARESHEET_METADATA_EXTRA)
+    public static final String EXTRA_METADATA_TEXT = "android.intent.extra.METADATA_TEXT";
+
+    /**
      * A {@link IntentSender} to start after instant app installation success.
      * @hide
      */

core/java/android/service/chooser/flags.aconfig

diff --git a/core/java/android/service/chooser/flags.aconfig b/core/java/android/service/chooser/flags.aconfig
index 3cc7f5a..79c94e3 100644
--- a/core/java/android/service/chooser/flags.aconfig
+++ b/core/java/android/service/chooser/flags.aconfig
@@ -8,6 +8,13 @@
 }
 
 flag {
+    name: "enable_sharesheet_metadata_extra"
+    namespace: "intentresolver"
+    description: "This flag enables sharesheet metadata to be displayed to users."
+    bug: "318942069"
+}
+
+flag {
   name: "support_nfc_resolver"
   namespace: "systemui"
   description: "This flag controls the new NFC 'resolver' activity"