hqd: add qservice binder for blocking dpps

Dpps should wait opening driver before composer comes up.
Add a wservice binder call to query composer init status.
Add util function to block dpps until composer is up.

Change-Id: I82c025011e23a0b159ef2449b00b868a365d681a
CRs-fixed: 2102579
diff --git a/libqservice/IQService.h b/libqservice/IQService.h
index 8985dd6..610cd4e 100644
--- a/libqservice/IQService.h
+++ b/libqservice/IQService.h
@@ -76,6 +76,7 @@
         SET_COLOR_MODE = 34, // Overrides the QDCM mode on the display
         GET_HDR_CAPABILITIES = 35, // Get HDR capabilities for legacy HWC interface
         SET_COLOR_MODE_BY_ID = 36, // Overrides the QDCM mode using the given mode ID
+        GET_COMPOSER_STATUS = 37, // Get composer init status-true if primary display init is done
         COMMAND_LIST_END = 400,
     };