Update icon cache version.

We increased the icon size in I96e228ad94540a517e89711310778774762e9ff3

Bug: 194124461
Test: manual, icons not blurry
Change-Id: I57a3fee49a24932dd2a4b2f7890c5fd2768af98b

iconloaderlib/src/com/android/launcher3/icons/cache/BaseIconCache.java

diff --git a/iconloaderlib/src/com/android/launcher3/icons/cache/BaseIconCache.java b/iconloaderlib/src/com/android/launcher3/icons/cache/BaseIconCache.java
index cb39490..d685737 100644
--- a/iconloaderlib/src/com/android/launcher3/icons/cache/BaseIconCache.java
+++ b/iconloaderlib/src/com/android/launcher3/icons/cache/BaseIconCache.java
@@ -510,7 +510,7 @@
      * Cache class to store the actual entries on disk
      */
     public static final class IconDB extends SQLiteCacheHelper {
-        private static final int RELEASE_VERSION = 30;
+        private static final int RELEASE_VERSION = 31;
 
         public static final String TABLE_NAME = "icons";
         public static final String COLUMN_ROWID = "rowid";