Android: Move non-test file out of javatest

Production files should not be in javatest/.

BUG=None

Review-Url: https://codereview.chromium.org/2843333003
Cr-Commit-Position: refs/heads/master@{#468308}

chrome/android/java_sources.gni

@@ -1264,7 +1264,7 @@ chrome_vr_java_sources = [
   "java/src/org/chromium/chrome/browser/vr_shell/VrDaydreamApiImpl.java",
   "java/src/org/chromium/chrome/browser/vr_shell/VrShellImpl.java",
   "java/src/org/chromium/chrome/browser/vr_shell/VrWindowAndroid.java",
-  "javatests/src/org/chromium/chrome/browser/vr_shell/OnDispatchTouchEventCallback.java",
+  "java/src/org/chromium/chrome/browser/vr_shell/OnDispatchTouchEventCallback.java",
 ]
 
 chrome_test_java_sources = [