Multiprocess test client: Android child process launcher rework.

base/BUILD.gn

Index: base/BUILD.gn
diff --git a/base/BUILD.gn b/base/BUILD.gn
index 0c4b35fa4cec2faca98dc4d73e87fe9f4fbd18b4..a07cede4e9002933d06fb4940409d27494bab405 100644
--- a/base/BUILD.gn
+++ b/base/BUILD.gn
@@ -2140,10 +2140,15 @@ test("base_unittests") {
   }
 
   if (is_android) {
+    sources -= [
+      "process/process_unittest.cc",
+      "process/process_util_unittest.cc",
+    ]
     deps += [
       ":base_java",
       ":base_java_unittest_support",
       "//base/android/jni_generator:jni_generator_tests",
+      "//base/test:test_support_java",
     ]
   }