manifest: Add mockito-kotlin

AOSP have added this repo in manifest with force push ^^

Change-Id: I34e6dd51d7eae7c090293a74136d7174fcfcf275
diff --git a/default.xml b/default.xml
index bd2df01..bb4f74e 100644
--- a/default.xml
+++ b/default.xml
@@ -390,6 +390,7 @@
   <project path="external/mobly-snippet-lib" name="platform/external/mobly-snippet-lib" groups="pdk" />
   <project path="external/mockftpserver" name="platform/external/mockftpserver" groups="pdk" />
   <project path="external/mockito" name="platform/external/mockito" groups="pdk" />
+  <project path="external/mockito-kotlin" name="platform/external/mockito-kotlin" groups="pdk" />
   <project path="external/mockwebserver" name="platform/external/mockwebserver" groups="pdk" />
   <project path="external/modp_b64" name="platform/external/modp_b64" groups="pdk" />
   <project path="external/mp4parser" name="platform/external/mp4parser" groups="pdk" />