[code coverage] Don't instrument app_hooks_java to avoid conflict

Upstream AppHooksImpl.java https://cs.chromium.org/chromium/src/chrome/android/java/src/org/chromium/chrome/browser/AppHooksImpl.java has a conflict with downstream AppHooksImpl.java like https://cs.corp.google.com/clank/java/src/org/chromium/chrome/browser/AppHooksImpl.java when generating coverage report.
Don't instrument the upstream one as the downstream targets will provide implementation.


Bug: 965606
Change-Id: I3094b3fcf846fceab4b3acb9624f96be0d36bee9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1641542Reviewed-by: David Trainor <dtrainor@chromium.org>
Commit-Queue: Yun Liu <yliuyliu@google.com>
Cr-Commit-Position: refs/heads/master@{#665716}

chrome/android/BUILD.gn

@@ -224,6 +224,7 @@ android_library("app_hooks_java") {
   deps = [
     ":chrome_java",
   ]
+  jacoco_never_instrument = true
 }
 
 android_aidl("photo_picker_aidl") {