libcutils: compile with BOARD_VNDK_VERSION current

- moved __android_log_is_debuggable to a new public header
    (log_properties.h)
- vendor version of sched_policy uses ALOG* instead SLOG*

Test: (sanity) liblog-unit-tests
Test: (sanity) libcutils_test (noting b/b/32972117, two tests continue
  to fail)
Test: system/core as a whole makes with BOARD_VNDK_VERSION := current
  now with no problems.
Test: boots/works on internal marlin
Bug: 33241851

Change-Id: I5bc1f348dc0f0c8814bec5b5c3d2c52c825ab640
diff --git a/libcutils/Android.bp b/libcutils/Android.bp
index f668f18..db1434b 100644
--- a/libcutils/Android.bp
+++ b/libcutils/Android.bp
@@ -144,7 +144,10 @@
     },
 
     shared_libs: ["liblog"],
-    header_libs: ["libcutils_headers"],
+    header_libs: [
+        "libcutils_headers",
+        "libutils_headers",
+    ],
     export_header_lib_headers: ["libcutils_headers"],
 
     cflags: [