fix(android): incorrect keyboard height (#2924)

Author: duryno

android/capacitor/src/main/java/com/getcapacitor/plugin/Keyboard.java

@@ -9,6 +9,7 @@
 import android.view.Display;
 import android.view.View;
 import android.view.ViewTreeObserver;
+import android.view.WindowInsets;
 import android.view.inputmethod.InputMethodManager;
 
 import com.getcapacitor.JSObject;
@@ -54,18 +55,20 @@ public void onGlobalLayout() {
             // cache properties for later use
             int rootViewHeight = rootView.getRootView().getHeight();
             int resultBottom = r.bottom;
-
-            // calculate screen height differently for android versions >= 21: Lollipop 5.x, Marshmallow 6.x
-            //http://stackoverflow.com/a/29257533/3642890 beware of nexus 5
             int screenHeight;
 
-            if (Build.VERSION.SDK_INT >= 21) {
+            if (Build.VERSION.SDK_INT >= 23) {
+              WindowInsets windowInsets = rootView.getRootWindowInsets();
+              int stableInsetBottom = windowInsets.getStableInsetBottom();
+              screenHeight = rootViewHeight;
+              resultBottom = resultBottom + stableInsetBottom;
+            } else {
+              // calculate screen height differently for android versions <23: Lollipop 5.x, Marshmallow 6.x
+              //http://stackoverflow.com/a/29257533/3642890 beware of nexus 5
               Display display = getActivity().getWindowManager().getDefaultDisplay();
               Point size = new Point();
               display.getSize(size);
               screenHeight = size.y;
-            } else {
-              screenHeight = rootViewHeight;
             }
 
             int heightDiff = screenHeight - resultBottom;