Webview: Build DownloadCollectionBridge for Android webview.

Currently we didn't build DownloadCollectionBridge for webview.

Bug: 1135162
Change-Id: Id7a2cb3fa263281216304b1c519271c95b44ae37
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2450721
Commit-Queue: Xing Liu <xingliu@chromium.org>
Reviewed-by: Min Qin <qinmin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#814010}

components/download/public/common/BUILD.gn

@@ -108,6 +108,7 @@ if (is_android) {
 
     deps = [
       "//base:base_java",
+      "//components/download/internal/common:internal_java",
       "//third_party/android_deps:androidx_annotation_annotation_java",
     ]
   }

third_party/android_provider/README.chromium

@@ -15,3 +15,4 @@ https://android.googlesource.com/platform/cts/+/master/tests/tests/provider/src/
 Local Modifications:
 - Added logs
 - Introduced some helper method.
+- Add @TargetApi(Build.VERSION_CODES.Q).

third_party/android_provider/java/src/org/chromium/third_party/android/provider/MediaStoreUtils.java

@@ -16,9 +16,11 @@
 
 package org.chromium.third_party.android.provider;
 
+import android.annotation.TargetApi;
 import android.content.ContentValues;
 import android.content.Context;
 import android.net.Uri;
+import android.os.Build;
 import android.os.ParcelFileDescriptor;
 import android.provider.MediaStore;
 import android.provider.MediaStore.DownloadColumns;
@@ -107,6 +109,7 @@ public class MediaStoreUtils {
          *
          * @see DownloadColumns#DOWNLOAD_URI
          */
+        @TargetApi(Build.VERSION_CODES.Q)
         public void setDownloadUri(@Nullable Uri downloadUri) {
             if (downloadUri == null) {
                 mInsertValues.remove(DownloadColumns.DOWNLOAD_URI);
@@ -121,6 +124,7 @@ public class MediaStoreUtils {
          *
          * @see DownloadColumns#REFERER_URI
          */
+        @TargetApi(Build.VERSION_CODES.Q)
         public void setRefererUri(@Nullable Uri refererUri) {
             if (refererUri == null) {
                 mInsertValues.remove(DownloadColumns.REFERER_URI);
@@ -221,6 +225,7 @@ public class MediaStoreUtils {
      * @param values ContentValues to be set.
      * @param isPending Whether the item is pending.
      */
+    @TargetApi(Build.VERSION_CODES.Q)
     private static void setPendingContentValues(ContentValues values, boolean isPending)
             throws Exception {
         values.put(MediaColumns.IS_PENDING, isPending ? 1 : 0);