Expose logToRadioBuffer as system API

Bug: 144374158
Test: make
Change-Id: I2d25a5844733ed7f1e0bb3f66d39f746f0f7acd8

api/module-lib-current.txt

@@ -124,3 +124,11 @@ package android.timezone {
 
 }
 
+package android.util {
+
+  public final class Log {
+    method public static int logToRadioBuffer(int, @Nullable String, @Nullable String);
+  }
+
+}
+

core/java/android/util/Log.java

@@ -19,6 +19,7 @@ package android.util;
 import android.annotation.IntDef;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
+import android.annotation.SystemApi;
 import android.compat.annotation.UnsupportedAppUsage;
 import android.os.DeadSystemException;
 
@@ -400,7 +401,7 @@ public final class Log {
      * @param message The message you would like logged.
      * @hide
      */
-    // @SystemApi(client= SystemApi.Client.MODULE_LIBRARIES) // TODO Uncomment once http://ag/9956147 is in.
+    @SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
     public static int logToRadioBuffer(@Level int priority, @Nullable String tag,
             @Nullable String message) {
         return println_native(LOG_ID_RADIO, priority, tag, message);