Drop platform_apis from android_library

This property is a no-op for this module type.

Test: m nothing
Bug: 215379393
Change-Id: I56509a6f926c0f1f2f02cd005d8d0a5321445ebc
diff --git a/tests/common/Android.bp b/tests/common/Android.bp
index cee655f..5ca89a1 100644
--- a/tests/common/Android.bp
+++ b/tests/common/Android.bp
@@ -33,6 +33,4 @@
         "kotlinx_coroutines_test",
         "truth",
     ],
-
-    platform_apis: true,
 }