Add various test files as testSrcs, so that they run on CI.

Test: go test
Test: TH (now that these are hooked up to TH)

Change-Id: Ia199794ef1a64074f3f9159f8c160ba3e45fd181

android/Android.bp

@@ -85,9 +85,11 @@ bootstrap_go_package {
         "androidmk_test.go",
         "apex_test.go",
         "arch_test.go",
+        "bazel_handler_test.go",
         "bazel_test.go",
         "config_test.go",
         "csuite_config_test.go",
+        "defaults_test.go",
         "depset_test.go",
         "deptag_test.go",
         "expand_test.go",

bazel/cquery/Android.bp

@@ -11,4 +11,7 @@ bootstrap_go_package {
     pluginFor: [
         "soong_build",
     ],
+    testSrcs: [
+        "request_type_test.go",
+    ],
 }

java/Android.bp

@@ -79,6 +79,7 @@ bootstrap_go_package {
         "droiddoc_test.go",
         "droidstubs_test.go",
         "hiddenapi_singleton_test.go",
+        "jacoco_test.go",
         "java_test.go",
         "jdeps_test.go",
         "kotlin_test.go",