EditText turn off hardware acc. for Oreo

Summary:
Research into this error led us to this: https://issuetracker.google.com/issues/67102093

which refers to a very similar stack trace as our error:
* Both errors have a bad access in `android.text.DynamicLayout.getBlockIndex` due to a negative array index
* The report mentions it only affecting Oreo devices, this aligns with our [LogView](https://our.intern.facebook.com/intern/logview/details/facebook_android_crashes/80ce327664e6696ef03f951a9268ac29/?trace_key=cc916846a500b6efb5c68ae1a2e6b5c3) where ~99% of affected device os versions are Oreo.

As a workaround mentioned in discussion, this diff turns off hardware acceleration for Oreo devices in `ReactEditText`

Reviewed By: mdvacca

Differential Revision: D14291369

fbshipit-source-id: 797d3123bcb240abd2401ca0d7d3a5a3ef8e22e3

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

@@ -109,6 +109,13 @@ public class ReactEditText extends EditText {
     mTextAttributes = new TextAttributes();
 
     applyTextAttributes();
+
+    // Turn off hardware acceleration for Oreo (T40484798)
+    // see https://issuetracker.google.com/issues/67102093
+    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O
+        && Build.VERSION.SDK_INT <= Build.VERSION_CODES.O_MR1) {
+      setLayerType(View.LAYER_TYPE_SOFTWARE, null);
+      }
   }
 
   // After the text changes inside an EditText, TextView checks if a layout() has been requested.