Add docs to Slog class.

Docs will be super useful, especially to new developers.
I see several docs and questions inside/outside google asking
what is it and when to use it.

Bug: 182476140
Test: m -j
Change-Id: Ibb41ab0b6fd808f2a1e5475103860fc415a502d6

parent 4aebcb6a

core/java/android/util/Slog.java

+4 −0

Original line number	Diff line number	Diff line
		@@ -26,6 +26,10 @@ import java.util.Formatter;
		import java.util.Locale;

		/**
		* API for sending log output to the {@link Log#LOG_ID_SYSTEM} buffer.
		*
		* <p>Should be used by system components. Use {@code adb logcat --buffer=system} to fetch the logs.
		*
		* @hide
		*/
		public final class Slog {