Version bump for development MediaProvider apex.

Version number must be > prebuilt.

Bug: 193059742
Test: m
Change-Id: I87ef8d458a0035601cbc35bae5cb398b81b735b2
diff --git a/apex/apex_manifest.json b/apex/apex_manifest.json
index d87ce8d..59c4963 100644
--- a/apex/apex_manifest.json
+++ b/apex/apex_manifest.json
@@ -1,4 +1,4 @@
 {
   "name": "com.android.mediaprovider",
-  "version": 309999910
+  "version": 319999910
 }