Add external/junit-params

It is in the same groups as external/icu as this is intended to
be used by external/icu.

Bug: 30244565
Change-Id: I5d35e43181db39e14be489a20f88710e3a9badcd

default.xml

@@ -175,6 +175,7 @@
   <project path="external/jsr305" name="platform/external/jsr305" groups="pdk-cw-fs,pdk-fs" />
   <project path="external/jsr330" name="platform/external/jsr330" groups="pdk" />
   <project path="external/junit" name="platform/external/junit" groups="pdk-cw-fs,pdk-fs" />
+  <project path="external/junit-params" name="platform/external/junit-params" groups="pdk" />
   <project path="external/kernel-headers" name="platform/external/kernel-headers" groups="pdk-cw-fs,pdk-fs" />
   <project path="external/ksoap2" name="platform/external/ksoap2" groups="pdk-cw-fs,pdk-fs" />
   <project path="external/libavc" name="platform/external/libavc" groups="pdk" />