Introduce common service client

In preparation for making common service access information
such as the maximum request length or supported serializations,
a common service client has been introduced that standardizes
common client state, including any available service access
info.  All clients refactored to use the common service client.

Signed-off-by: Julian Hall <julian.hall@arm.com>
Change-Id: I31336901476f5647d2ed00294716940f475da08c
diff --git a/deployments/psa-api-test/psa-api-test.cmake b/deployments/psa-api-test/psa-api-test.cmake
index a1262c2..0a84c65 100644
--- a/deployments/psa-api-test/psa-api-test.cmake
+++ b/deployments/psa-api-test/psa-api-test.cmake
@@ -27,6 +27,7 @@
 	BASE_DIR ${TS_ROOT}
 	COMPONENTS
 		"components/common/tlv"
+		"components/service/common/client"
 		"components/service/common/include"
 		"components/rpc/common/caller"
 		"components/rpc/common/logging"