ANDROID: Don't build with mlock2.h

Some of the mm tests don't need to be built with the mlock2.h header
file.

Bug: 291147200
Change-Id: Ia1f08be61936f4c8e653db9e8b17616b6ab26cba
Signed-off-by: Edward Liaw <edliaw@google.com>

BUILD.bazel

@@ -1515,7 +1515,6 @@ cc_library(
 cc_binary_with_abi(
     name = "kselftest_mm_thuge_gen",
     srcs = [
-        "tools/testing/selftests/mm/mlock2.h",
         "tools/testing/selftests/mm/thuge-gen.c",
     ],
     copts = [
@@ -1535,7 +1534,6 @@ cc_binary_with_abi(
 cc_binary_with_abi(
     name = "kselftest_mm_transhuge_stress",
     srcs = [
-        "tools/testing/selftests/mm/mlock2.h",
         "tools/testing/selftests/mm/transhuge-stress.c",
     ],
     copts = [