Revert "Make bionic_platform_headers available only for Bionic t..."

Reason for revert: Breaks rvc-d1-dev-plus-aosp: http://ab/6443190
Reverted Changes:
Ide447b89a:bionic_libc_platform_headers is only available whe...
Ia93cd3ec8:bionic_libc_platform_headers is only available whe...
Icdc495588:Make bionic_platform_headers available only for Bi...
Idfd7c87dc:bionic_libc_platform_headers is only available whe...

Bug: 152255951
Bug: 155269399
Change-Id: I214f1165bb0a7e59d3b35a13b3cceb1965be922b
diff --git a/tests/Android.bp b/tests/Android.bp
index 75fdd90..c751084 100644
--- a/tests/Android.bp
+++ b/tests/Android.bp
@@ -22,12 +22,6 @@
         darwin: {
             enabled: false,
         },
-        android: {
-            header_libs: ["bionic_libc_platform_headers"],
-        },
-        linux_bionic: {
-            header_libs: ["bionic_libc_platform_headers"],
-        },
     },
     cflags: [
         "-fstack-protector-all",
@@ -44,6 +38,7 @@
         // For glibc.
         "-D__STDC_LIMIT_MACROS",
     ],
+    header_libs: ["bionic_libc_platform_headers"],
     // Ensure that the tests exercise shadow call stack support and
     // the hint space PAC/BTI instructions.
     arch: {