Unhide findPath() API. Add JavaDoc to related features.

Also remove comments that disallow folders in search results.

Test: It builds.

Bug: 30948740
Bug: 32512923
Change-Id: I72706b69163aa98ee9568939e09e5048b6e8f9f8
diff --git a/core/java/android/content/Intent.java b/core/java/android/content/Intent.java
index e031275..4eecd48 100644
--- a/core/java/android/content/Intent.java
+++ b/core/java/android/content/Intent.java
@@ -3120,6 +3120,11 @@
      * URIs that can be opened with
      * {@link ContentResolver#openFileDescriptor(Uri, String)}.
      * <p>
+     * Callers can set a document URI through {@link #setData(Uri)} to indicate
+     * the initial location of documents navigator. System will do its best to
+     * launch the navigator in the specified document if it's a folder, or the
+     * folder that contains the specified document if not.
+     * <p>
      * Output: The URI of the item that was picked, returned in
      * {@link #getData()}. This must be a {@code content://} URI so that any
      * receiver can access it. If multiple documents were selected, they are
@@ -3156,6 +3161,11 @@
      * URIs that can be opened with
      * {@link ContentResolver#openFileDescriptor(Uri, String)}.
      * <p>
+     * Callers can set a document URI through {@link #setData(Uri)} to indicate
+     * the initial location of documents navigator. System will do its best to
+     * launch the navigator in the specified document if it's a folder, or the
+     * folder that contains the specified document if not.
+     * <p>
      * Output: The URI of the item that was created. This must be a
      * {@code content://} URI so that any receiver can access it.
      *
@@ -3178,6 +3188,11 @@
      * {@link DocumentsContract#buildChildDocumentsUriUsingTree(Uri, String)}
      * with the returned URI.
      * <p>
+     * Callers can set a document URI through {@link #setData(Uri)} to indicate
+     * the initial location of documents navigator. System will do its best to
+     * initiate the navigator in the specified document if it's a folder, or
+     * the folder that contains the specified document if not.
+     * <p>
      * Output: The URI representing the selected directory tree.
      *
      * @see DocumentsContract