[code coverage] Don't instrument java annotation processor

JaCoCo agent will write execution data during building and throw exception when building "compile_java" targets.

Bug: 967049, 843307
Change-Id: I152e12ced21c919bc43ca1a2836146d4bd65426b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1636313Reviewed-by: Eric Stevenson <estevenson@chromium.org>
Reviewed-by: Tibor Goldschwendt <tiborg@chromium.org>
Commit-Queue: Yun Liu <yliuyliu@google.com>
Cr-Commit-Position: refs/heads/master@{#664828}

base/android/jni_generator/BUILD.gn

@@ -105,4 +105,5 @@ java_annotation_processor("jni_processor") {
   ]
 
   srcjar_deps = [ ":processor_args_java" ]
+  jacoco_never_instrument = true
 }

components/module_installer/android/BUILD.gn

@@ -73,4 +73,5 @@ java_annotation_processor("module_interface_processor") {
     "//third_party/android_deps:com_squareup_javapoet_java",
     "//third_party/auto:auto_service_java",
   ]
+  jacoco_never_instrument = true
 }