RDKB-62594 : Addition of RFC parameter for Stage agent (#235)

US: RDKB-62968: Subtask: RDKB-63632 - Addition of RFC parameter for
Stage Agent

Reason for change: Add RFC flag
Device.DeviceInfo.X_RDKCENTRAL-COM_RFC.Feature.STAGE.Enable
to execute the app
Test Procedure: Build with stage agent changes and test
Risks: None

Is this a Bug or a User Story (US)?: US: RDKB-62968 - STAGE development
- Phase 1 (SSH trigger). Subtask: RDKB-63632
2. If it is a User Story:
* Have all dependent PRs from other components been listed (if any)?:
Below PR's are dependent PR's
   rdkcentral/tr69hostif#366
   #235
   rdkcentral/provisioning-and-management#195
* Does the commit message include both the User Story ticket and the
Subtask ticket?
Yes
* Will be all changes related to the User Story squashed and merged in a
single commit?: No
* Has the PR been raised only after completing all changes for the User
Story (no partial changes)? : Yes
* Has code development for the User Story been completed?: Yes
* If yes, has the Gerrit topic or list of all dependent PRs across
components (including meta-layer changes) been shared?:topic:
https://gerrit.teamccp.com/#/q/topic:RDKB-62968-StageAgent-26Q1_sprint+(status:open+OR+status:merged)
3. Is there a validation log available in the Jira ticket for verifying
builds with the updated generic-srcrev.inc across all platforms?: Yes
* If yes, have the links to validation comments been shared?:
https://ccp.sys.comcast.net/secure/attachment/14230070/14230070_D89C8E72F2E0_Stage_Logs_02-20-26-06-19AM.tgz

Signed-off-by: rriyaz502 <Riyaz_Riyaz@comcast.com>
Co-authored-by: rriyaz502 <Riyaz_Riyaz@comcast.com>

Author: Khan3033

source/scripts/init/defaults/system_defaults_arm

@@ -1497,3 +1497,5 @@ $FwDwld_AvlMem_RsrvThreshold=20
 #FwDwld_ImageProcMemPercent Default value
 $FwDwld_ImageProcMemPercent=0
 
+#STAGE Default value
+$StageEnabled=false

source/scripts/init/defaults/system_defaults_bci

@@ -1346,3 +1346,6 @@ $FwDwld_AvlMem_RsrvThreshold=20
 
 #FwDwld_ImageProcMemPercent Default value
 $FwDwld_ImageProcMemPercent=0
+
+#STAGE Default value
+$StageEnabled=false