Fix linter

Author: Emmanuel Garcia

testing/scenario_app/android/app/build.gradle

@@ -8,9 +8,10 @@ android {
         showAll true
         warningsAsErrors true
         checkTestSources true
+        textReport true
         textOutput 'stdout'
         htmlReport false
-        xmlReport true
+        xmlReport false
         xmlOutput file("${rootProject.buildDir}/reports/lint-results.xml")
         // UnpackedNativeCode can break stack unwinding - see b/193408481
         // NewerVersionAvailable and GradleDependency need to be taken care of

testing/scenario_app/android/app/lint-results.txt

@@ -0,0 +1,14 @@
+/Users/egarciad/p/engine/src/flutter/testing/scenario_app/android/app/src/main/java/dev/flutter/scenarios/TextPlatformView.java:32: Error: Access to private field textView of class TextPlatformView requires synthetic accessor [SyntheticAccessor]
+                textView.invalidate();
+                ~~~~~~~~
+
+   Explanation for issues of type "SyntheticAccessor":
+   A private inner class which is accessed from the outer class will force the
+   compiler to insert a synthetic accessor; this means that you are causing
+   extra overhead. This is not important in small projects, but is important
+   for large apps running up against the 64K method handle limit, and
+   especially for libraries where you want to make sure your library is as
+   small as possible for the cases where your library is used in an app
+   running up against the 64K limit.
+
+1 errors, 0 warnings

testing/scenario_app/android/app/src/main/java/dev/flutter/scenarios/TextPlatformView.java

@@ -14,7 +14,7 @@
 import io.flutter.plugin.platform.PlatformView;
 
 public class TextPlatformView implements PlatformView {
-  private final TextView textView;
+  final TextView textView;
 
   @SuppressWarnings("unchecked")
   TextPlatformView(@NonNull final Context context, int id, @Nullable String params) {