liblog: move log_is_loggable.c to properties.c

Just makes sense cleanup

Test: gTest liblog-unit-tests
Bug: 33535908
Change-Id: I85de049f3cd73a473d56db5970d42eee5f9f70a8
diff --git a/liblog/Android.bp b/liblog/Android.bp
index e59a460..2424dba 100644
--- a/liblog/Android.bp
+++ b/liblog/Android.bp
@@ -30,7 +30,7 @@
     "event_tag_map.cpp",
     "config_read.c",
     "log_time.cpp",
-    "log_is_loggable.c",
+    "properties.c",
     "logprint.c",
     "pmsg_reader.c",
     "pmsg_writer.c",