tdf#89215 only process state changes after TileProvider is ready

otherwise the handling tries to access properties like fonts too early
and trigger NPEs

Change-Id: I132c02f936c7b3e70fced1e1e022a6cf803ed5ff

android/source/src/java/org/libreoffice/InvalidationHandler.java

@@ -239,7 +239,10 @@ public class InvalidationHandler implements Document.MessageCallback, Office.Mes
         }
         final String value = parts[1];
         boolean pressed = Boolean.parseBoolean(value);
-
+        if (!mContext.getTileProvider().isReady()) {
+            Log.w(LOGTAG, "tile provider not ready, ignoring payload "+payload);
+            return;
+        }
         if (parts[0].equals(".uno:Bold")) {
             mContext.getFormattingController().onToggleStateChanged(Document.BOLD, pressed);
         } else if (parts[0].equals(".uno:Italic")) {

android/source/src/java/org/libreoffice/LibreOfficeMainActivity.java

@@ -719,6 +719,10 @@ public class LibreOfficeMainActivity extends AppCompatActivity implements Settin
         mTileProvider = loKitTileProvider;
     }
 
+    public LOKitTileProvider getTileProvider() {
+        return mTileProvider;
+    }
+
     public void savePassword(String pwd) {
         mPassword = pwd;
         synchronized (mTileProvider.getMessageCallback()) {