TpDynamicHandleRepo: store handle data in a GArray, not a GHashTable
TpDynamicHandleRepo: store handle data in a GArray, not a GHashTable

Now that we don't deallocate handles, the keys will always be dense,
so we can benefit from having a single blob of memory keyed by simple
array access.

Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib