AETHER-455 Add edge monitoring agent for Sercomm CBRS dongle

Also enhanced ADB based agent and moved it under agent_adb folder

Change-Id: I146c70d5d249f584a006ef90fbc17a4636dacac5
diff --git a/edge-monitoring/agent_modem/requirements.txt b/edge-monitoring/agent_modem/requirements.txt
new file mode 100644
index 0000000..1b96c7b
--- /dev/null
+++ b/edge-monitoring/agent_modem/requirements.txt
@@ -0,0 +1,2 @@
+requests
+pyserial