Version 2.2.31

Bug: 171197204
Bug: 170677722
Change-Id: I488df5b81fc8e938129d9349db4763c5329ac036

src/main/java/com/android/tools/r8/Version.java

diff --git a/src/main/java/com/android/tools/r8/Version.java b/src/main/java/com/android/tools/r8/Version.java
index ecb61b2..52fe694 100644
--- a/src/main/java/com/android/tools/r8/Version.java
+++ b/src/main/java/com/android/tools/r8/Version.java
@@ -11,7 +11,7 @@
 
   // This field is accessed from release scripts using simple pattern matching.
   // Therefore, changing this field could break our release scripts.
-  public static final String LABEL = "2.2.30";
+  public static final String LABEL = "2.2.31";
 
   private Version() {
   }