React edit text changes (#25964)

Summary:
Changing showSoftKeyboard and hideSoftKeyboard to be protected, as we need this change for an internal control that extends ReactEditText.

## Changelog

[Android] [Changed] - part of our react native platform, we have a control that extends ReactEditText and we need to be able to override these 2 methods.
Pull Request resolved: https://github.com/facebook/react-native/pull/25964

Test Plan: The change has been in Microsoft's branch of RN for almost 2 years, and since it's a relatively small change we've done a quick sanity check in RNTester prior to this PR, making sure the TextInput page loads fine and it's functional.

Differential Revision: D16686878

Pulled By: cpojer

fbshipit-source-id: 63035ee9c58e93bc0fa40e5bec318df05322c6c5

ReactAndroid/src/main/java/com/facebook/react/views/textinput/ReactEditText.java

@@ -484,11 +484,11 @@ public class ReactEditText extends EditText {
     return true;
   }
 
-  private boolean showSoftKeyboard() {
+  protected boolean showSoftKeyboard() {
     return mInputMethodManager.showSoftInput(this, 0);
   }
 
-  private void hideSoftKeyboard() {
+  protected void hideSoftKeyboard() {
     mInputMethodManager.hideSoftInputFromWindow(getWindowToken(), 0);
   }