Messaging: Migrate attachments to MediaStore

* Saving them doesn't work otherwise
* We don't have to care about MediaScanner and DownloadManager
  anymore that way, either

Fixes: https://gitlab.com/LineageOS/issues/android/-/issues/8573
Change-Id: I7a3b1dc6916feff4849bdfa2b8937460c32bc5a2
Signed-off-by: Aayush Gupta <aayushgupta219@gmail.com>
(cherry picked from commit 93bd39838d4a395dd710796b0e71ada1ec1f5ff2)

src/com/android/messaging/util/UriUtil.java

@@ -258,14 +258,12 @@ public class UriUtil {
 
     /**
      * Persist a piece of content from the given sourceUri, byte by byte to the
-     * specified output directory.
-     * @return the output Uri if the operation succeeded, or null if failed.
+     * specified targetUri.
      */
     @DoesNotRunOnMainThread
-    public static Uri persistContent(
-            final Uri sourceUri, final File outputDir, final String contentType) {
+    public static void persistContent(
+            final Context context, final Uri sourceUri, final Uri targetUri) {
         InputStream inputStream = null;
-        final Context context = Factory.get().getApplicationContext();
         try {
             if (UriUtil.isLocalResourceUri(sourceUri)) {
                 inputStream = context.getContentResolver().openInputStream(sourceUri);
@@ -273,13 +271,12 @@ public class UriUtil {
                 // The content is remote. Download it.
                 inputStream = getInputStreamFromRemoteUri(sourceUri);
                 if (inputStream == null) {
-                    return null;
+                    return;
                 }
             }
-            return persistContent(inputStream, outputDir, contentType);
+            copyContent(context, inputStream, targetUri);
         } catch (final Exception ex) {
             LogUtil.e(LogUtil.BUGLE_TAG, "Error while retrieving media ", ex);
-            return null;
         } finally {
             if (inputStream != null) {
                 try {