Stop special-casing Android 11+ from large form-factor keyboardShouldPersistTaps behavior

Summary:
ScrollView has special-case logic to dismiss keyboard on tap, controlled via the `keyboardShouldPersistTaps` property. The first click does not propagate to children of the scrollview if the tap causes the keyboard to be dismissed. This behavior is motivated by a soft keyboard on phones which takes away space from the viewport.

ScrollView historically determined if a soft-keyboard was open via querying if there was a focused TextInput. This meant that clicks to a ScrollView would be eaten, even on form factors using phsyical keyboards.

A couple years ago I added #30374 to only eat clicks when keyboard events have indicated that a soft keyboard is present. I special-cased Android out of the change, because of platform issues with its reliability of keyboard events.

After D38500859 (1e48274) rolls out we can start to remove that special-casing, of devices which report "android" for Platform.OS.

Reviewed By: javache

Differential Revision: D38528887

fbshipit-source-id: a745b478b18abe4ef32cbdd8a14ca6dfdb5e738f

Author: NickGerleman

Libraries/Components/ScrollView/ScrollView.js

@@ -1545,10 +1545,9 @@ class ScrollView extends React.Component<Props, State> {
 
     // Even if an input is focused, we may not have a keyboard to dismiss. E.g
     // when using a physical keyboard. Ensure we have an event for an opened
-    // keyboard, except on Android where setting windowSoftInputMode to
-    // adjustNone leads to missing keyboard events.
+    // keyboard.
     const softKeyboardMayBeOpen =
-      this._keyboardMetrics != null || Platform.OS === 'android';
+      this._keyboardMetrics != null || this._keyboardEventsAreUnreliable();
 
     return hasFocusedTextInput && softKeyboardMayBeOpen;
   };
@@ -1562,6 +1561,12 @@ class ScrollView extends React.Component<Props, State> {
     return this._keyboardMetrics != null && this._keyboardMetrics.height === 0;
   };
 
+  _keyboardEventsAreUnreliable: () => boolean = () => {
+    // Android versions prior to API 30 rely on observing layout changes when
+    // `android:windowSoftInputMode` is set to `adjustResize` or `adjustPan`.
+    return Platform.OS === 'android' && Platform.Version < 30;
+  };
+
   /**
    * Invoke this from an `onTouchEnd` event.
    *