Android: Extend app state listener interface with native plugin state

Instead of using the generic onAppStateDetailsChanged function, use a
specific callback for native plugin readiness state in cases where only
native plugin readiness matters.

Add default empty implementations for both functions in the interface.

Task-number: QTBUG-118874
Change-Id: Ie736b0e7789400421247648cb3a008712fd959c5
Reviewed-by: Assam Boudjelthia <assam.boudjelthia@qt.io>

src/android/jar/src/org/qtproject/qt/android/QtEmbeddedDelegate.java

@@ -89,11 +89,17 @@ class QtEmbeddedDelegate extends QtActivityDelegateBase
     public void onAppStateDetailsChanged(QtNative.ApplicationStateDetails details) {
         synchronized (this) {
             m_stateDetails = details;
-            if (m_stateDetails.nativePluginIntegrationReady) {
+        }
+    }
+
+    @Override
+    public void onNativePluginIntegrationReadyChanged(boolean ready)
+    {
+        synchronized (this) {
+            if (ready) {
                 QtNative.runAction(() -> {
                     DisplayMetrics metrics = Resources.getSystem().getDisplayMetrics();
-                    QtDisplayManager.setApplicationDisplayMetrics(m_activity,
-                                                                  metrics.widthPixels,
+                    QtDisplayManager.setApplicationDisplayMetrics(m_activity, metrics.widthPixels,
                                                                   metrics.heightPixels);
 
                 });

src/android/jar/src/org/qtproject/qt/android/QtNative.java

@@ -196,7 +196,8 @@ class QtNative
     }
 
     interface AppStateDetailsListener {
-        void onAppStateDetailsChanged(ApplicationStateDetails details);
+        default void onAppStateDetailsChanged(ApplicationStateDetails details) {}
+        default void onNativePluginIntegrationReadyChanged(boolean ready) {}
     }
 
     // Keep in sync with src/corelib/global/qnamespace.h
@@ -228,6 +229,7 @@ class QtNative
     public static void notifyNativePluginIntegrationReady(boolean ready)
     {
         m_stateDetails.nativePluginIntegrationReady = ready;
+        notifyNativePluginIntegrationReadyChanged(ready);
         notifyAppStateDetailsChanged(m_stateDetails);
     }
 
@@ -258,6 +260,13 @@ class QtNative
         }
     }
 
+    static void notifyNativePluginIntegrationReadyChanged(boolean ready) {
+        synchronized (m_appStateListenersLock) {
+            for (final AppStateDetailsListener listener : m_appStateListeners)
+                listener.onNativePluginIntegrationReadyChanged(ready);
+        }
+    }
+
     static void notifyAppStateDetailsChanged(ApplicationStateDetails details) {
         synchronized (m_appStateListenersLock) {
             for (AppStateDetailsListener listener : m_appStateListeners)

src/android/jar/src/org/qtproject/qt/android/QtServiceEmbeddedDelegate.java

@@ -38,10 +38,10 @@ class QtServiceEmbeddedDelegate implements QtEmbeddedViewInterface, QtNative.App
     }
 
     @Override
-    public void onAppStateDetailsChanged(QtNative.ApplicationStateDetails details)
+    public void onNativePluginIntegrationReadyChanged(boolean ready)
     {
         synchronized (this) {
-            if (details.nativePluginIntegrationReady) {
+            if (ready) {
                 QtNative.runAction(() -> {
                     if (m_view == null)
                         return;