Re-emit keyboardDidShow on IME height change

Summary:
Follow-up to D100437445, which replaced the legacy height-based IME detector in `ReactRootView.CustomGlobalLayoutListener` with a visibility-only detector (`WindowInsetsCompat.Type.ime()`).

The legacy code also re-emitted `keyboardDidShow` whenever the IME *height* changed while still visible (e.g., user toggles the emoji panel or predictive bar). Removing that left these JS consumers reading stale `endCoordinates`:
- `KeyboardAvoidingView` — caches `_keyboardEvent`, no longer resizes on IME height changes.
- `ScrollView` — caches `_keyboardMetrics`; focused `TextInput` auto-scroll uses stale `screenY`/`height`.
- `Keyboard.metrics()` — public API returning the cached payload from the last `keyboardDidShow`.

Fix: track the last reported IME height and re-emit `keyboardDidShow` when the keyboard is visible AND (it just appeared OR the height changed), restoring pre-D100437445 semantics. The hide branch is gated on `mKeyboardIsVisible` so it still fires exactly once per cycle.

Changelog: [Android][Fixed] KeyboardAvoidingView and TextInput auto-scroll not responding to IME height changes (e.g., when toggling emoji panel or predictive bar)

Differential Revision: D101385688

Author: alanleedev

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/ReactRootView.java

@@ -931,6 +931,7 @@ private class CustomGlobalLayoutListener implements ViewTreeObserver.OnGlobalLay
     private final Rect mVisibleViewArea;
 
     private boolean mKeyboardIsVisible = false;
+    private int mKeyboardHeight = 0;
     private int mDeviceRotation = 0;
 
     /* package */ CustomGlobalLayoutListener() {
@@ -957,13 +958,17 @@ private void checkForKeyboardEvents() {
       }
 
       boolean keyboardIsVisible = rootInsets.isVisible(WindowInsetsCompat.Type.ime());
-      if (keyboardIsVisible != mKeyboardIsVisible) {
-        mKeyboardIsVisible = keyboardIsVisible;
-        Insets barInsets = rootInsets.getInsets(WindowInsetsCompat.Type.systemBars());
+      Insets barInsets = rootInsets.getInsets(WindowInsetsCompat.Type.systemBars());
 
-        if (keyboardIsVisible) {
-          Insets imeInsets = rootInsets.getInsets(WindowInsetsCompat.Type.ime());
-          int height = imeInsets.bottom - barInsets.bottom;
+      if (keyboardIsVisible) {
+        Insets imeInsets = rootInsets.getInsets(WindowInsetsCompat.Type.ime());
+        int height = imeInsets.bottom - barInsets.bottom;
+
+        // Re-emit on height change while keyboard stays visible (e.g., emoji
+        // panel toggle); JS consumers cache endCoordinates from keyboardDidShow.
+        if (!mKeyboardIsVisible || height != mKeyboardHeight) {
+          mKeyboardIsVisible = true;
+          mKeyboardHeight = height;
 
           ViewGroup.LayoutParams rootLayoutParams = getRootView().getLayoutParams();
           Assertions.assertCondition(rootLayoutParams instanceof WindowManager.LayoutParams);
@@ -981,15 +986,18 @@ private void checkForKeyboardEvents() {
                   PixelUtil.toDIPFromPixel(mVisibleViewArea.left),
                   PixelUtil.toDIPFromPixel(mVisibleViewArea.width()),
                   PixelUtil.toDIPFromPixel(height)));
-        } else {
-          sendEvent(
-              "keyboardDidHide",
-              createKeyboardEventPayload(
-                  PixelUtil.toDIPFromPixel(mVisibleViewArea.bottom + barInsets.bottom),
-                  0,
-                  PixelUtil.toDIPFromPixel(mVisibleViewArea.width()),
-                  0));
         }
+      } else if (mKeyboardIsVisible) {
+        mKeyboardIsVisible = false;
+        mKeyboardHeight = 0;
+
+        sendEvent(
+            "keyboardDidHide",
+            createKeyboardEventPayload(
+                PixelUtil.toDIPFromPixel(mVisibleViewArea.bottom + barInsets.bottom),
+                0,
+                PixelUtil.toDIPFromPixel(mVisibleViewArea.width()),
+                0));
       }
     }