Expose logToRadioBuffer as system API

Bug: 144374158
Test: make
Change-Id: I2d25a5844733ed7f1e0bb3f66d39f746f0f7acd8
diff --git a/api/module-lib-current.txt b/api/module-lib-current.txt
index c8253a0..1cb1c20 100644
--- a/api/module-lib-current.txt
+++ b/api/module-lib-current.txt
@@ -124,3 +124,11 @@
 
 }
 
+package android.util {
+
+  public final class Log {
+    method public static int logToRadioBuffer(int, @Nullable String, @Nullable String);
+  }
+
+}
+