Delay SharedClipboardShareActivity animation until native is lodaded

- We can only get correct data in adapter after native is initialized,
  which is needed to correctly decide if empty view should be shown
- This will result in a mask being shown full screen (instead of zero
  state view) while native is loaded
- Before: https://drive.google.com/file/d/1b6tKuRSj7LPOLr7O5h7XrWqfK4tJfJp9
- After: https://drive.google.com/file/d/14Nd650D85TwMjCJgtQmalgmB3uCt0kNg

Bug: 1002852
Change-Id: I6626865cbee2e9e9eee5664ae83139d428b7d0ee
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1798322Reviewed-by: Richard Knoll <knollr@chromium.org>
Reviewed-by: Boris Sazonov <bsazonov@chromium.org>
Commit-Queue: Alex Chau <alexchau@chromium.org>
Cr-Commit-Position: refs/heads/master@{#695625}

chrome/android/java/res/layout/sharing_device_picker.xml

@@ -47,7 +47,8 @@
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:paddingBottom="32dp"
-        android:orientation="vertical">
+        android:orientation="vertical"
+        android:visibility="gone">
 
       <ImageView
           android:id="@+id/empty_state_image"

chrome/android/java/src/org/chromium/chrome/browser/sharing/shared_clipboard/SharedClipboardShareActivity.java

@@ -35,7 +35,6 @@ import org.chromium.ui.widget.ButtonCompat;
 public class SharedClipboardShareActivity
         extends AsyncInitializationActivity implements OnItemClickListener {
     private SharingAdapter mAdapter;
-    private ListView mListView;
 
     /**
      * Checks whether sending shared clipboard message is enabled for the user and enables/disables
@@ -75,13 +74,6 @@ public class SharedClipboardShareActivity
         View mask = findViewById(R.id.mask);
         mask.setOnClickListener(v -> finish());
 
-        mListView = findViewById(R.id.device_picker_list);
-        mListView.setAdapter(mAdapter);
-        mListView.setOnItemClickListener(this);
-        mListView.setEmptyView(findViewById(R.id.empty_state));
-
-        View content = findViewById(R.id.device_picker_content);
-        content.startAnimation(AnimationUtils.loadAnimation(this, R.anim.slide_in_up));
 
         ButtonCompat chromeSettingsButton = findViewById(R.id.chrome_settings);
         if (!AndroidSyncSettings.get().isChromeSyncEnabled()) {
@@ -109,7 +101,13 @@ public class SharedClipboardShareActivity
             findViewById(R.id.device_picker_toolbar).setVisibility(View.VISIBLE);
         }
 
-        mListView.setAdapter(mAdapter);
+        ListView listView = findViewById(R.id.device_picker_list);
+        listView.setAdapter(mAdapter);
+        listView.setOnItemClickListener(this);
+        listView.setEmptyView(findViewById(R.id.empty_state));
+
+        View content = findViewById(R.id.device_picker_content);
+        content.startAnimation(AnimationUtils.loadAnimation(this, R.anim.slide_in_up));
     }
 
     @Override