WebView: use proper javadocs

Javadocs need to start with "/**", not "/*". This can unexpectedly
trigger a presubmit failure if someone changes something else in these
methods.

This also fixes an import-order presubmit error.

Bug: 65553544
Test: make -j30 docs (no visible change)
Change-Id: I1bc8ef479e3dc9378e58904d0b317c4775117390
diff --git a/core/java/android/webkit/WebSyncManager.java b/core/java/android/webkit/WebSyncManager.java
index 801be12..03b94e7 100644
--- a/core/java/android/webkit/WebSyncManager.java
+++ b/core/java/android/webkit/WebSyncManager.java
@@ -18,7 +18,7 @@
 
 import android.content.Context;
 
-/*
+/**
  * @deprecated The WebSyncManager no longer does anything.
  */
 @Deprecated