gn2bp: Cancel -DANDROID if it's not specified

Test: ./update_results.sh
Change-Id: I2aedd1f170d19e6cf66fcfa35a4189eb2c9dcfa9
diff --git a/tools/gn2bp/Android.bp.swp b/tools/gn2bp/Android.bp.swp
index 630e946..376b8f1 100644
--- a/tools/gn2bp/Android.bp.swp
+++ b/tools/gn2bp/Android.bp.swp
@@ -1727,6 +1727,7 @@
         "-D_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS",
         "-D_LIBCPP_ENABLE_ASSERTIONS_DEFAULT=1",
         "-D_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS",
+        "-UANDROID",
     ],
     local_include_dirs: [
         "./",
@@ -1773,6 +1774,7 @@
         "-D_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS",
         "-D_LIBCPP_ENABLE_ASSERTIONS_DEFAULT=1",
         "-D_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS",
+        "-UANDROID",
     ],
     local_include_dirs: [
         "./",
@@ -1814,6 +1816,7 @@
         "-D_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS",
         "-D__STDC_CONSTANT_MACROS",
         "-D__STDC_FORMAT_MACROS",
+        "-UANDROID",
     ],
     local_include_dirs: [
         "./",
@@ -4379,6 +4382,7 @@
         "-D_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS",
         "-D__STDC_CONSTANT_MACROS",
         "-D__STDC_FORMAT_MACROS",
+        "-UANDROID",
     ],
     local_include_dirs: [
         "./",
@@ -6783,6 +6787,7 @@
         "-D_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS",
         "-D__STDC_CONSTANT_MACROS",
         "-D__STDC_FORMAT_MACROS",
+        "-UANDROID",
     ],
     local_include_dirs: [
         "./",