Rename rc to return code for clarity

Author: bgiori

mcumgr-android-lib/src/main/java/io/runtime/mcumgr/dfu/FirmwareUpgradeManager.java

@@ -337,7 +337,7 @@ public void onResponse(@NonNull final McuMgrImageStateResponse response) {
 
                     // Check for an error return code
                     if (!response.isSuccess()) {
-                        fail(new McuMgrErrorException(response.getRc()));
+                        fail(new McuMgrErrorException(response.getReturnCode()));
                         return;
                     }
 
@@ -432,7 +432,7 @@ public void onResponse(@NonNull McuMgrImageStateResponse response) {
             Log.v(TAG, "Test response: " + response.toString());
             // Check for an error return code
             if (!response.isSuccess()) {
-                fail(new McuMgrErrorException(response.getRc()));
+                fail(new McuMgrErrorException(response.getReturnCode()));
                 return;
             }
             if (response.images.length != 2) {
@@ -495,7 +495,7 @@ public void onResponse(@NonNull McuMgrResponse response) {
             Log.v(TAG, "Reset request sent. Waiting for reset");
             // Check for an error return code
             if (!response.isSuccess()) {
-                fail(new McuMgrErrorException(response.getRc()));
+                fail(new McuMgrErrorException(response.getReturnCode()));
             }
         }
 
@@ -516,7 +516,7 @@ public void onResponse(@NonNull McuMgrImageStateResponse response) {
                     Log.v(TAG, "Confirm response: " + response.toString());
                     // Check for an error return code
                     if (!response.isSuccess()) {
-                        fail(new McuMgrErrorException(response.getRc()));
+                        fail(new McuMgrErrorException(response.getReturnCode()));
                         return;
                     }
                     if (response.images.length == 0) {

mcumgr-android-lib/src/main/java/io/runtime/mcumgr/response/McuMgrResponse.java

@@ -49,7 +49,7 @@ public class McuMgrResponse {
     /**
      * The return code (enum) for this response. For the raw return code use the "rc" property.
      */
-    private McuMgrErrorCode mRc;
+    private McuMgrErrorCode mReturnCode;
 
     /**
      * McuMgr payload for this response. This does not include the McuMgr header for standard
@@ -91,12 +91,12 @@ public McuMgrHeader getHeader() {
      *
      * @return Mcu Manager return code.
      */
-    public int getRcValue() {
-        if (mRc == null) {
+    public int getReturnCodeValue() {
+        if (mReturnCode == null) {
             Log.w(TAG, "Response does not contain a McuMgr return code.");
             return 0;
         } else {
-            return mRc.value();
+            return mReturnCode.value();
         }
     }
 
@@ -105,8 +105,8 @@ public int getRcValue() {
      *
      * @return The return code enum.
      */
-    public McuMgrErrorCode getRc() {
-        return mRc;
+    public McuMgrErrorCode getReturnCode() {
+        return mReturnCode;
     }
 
     /**
@@ -187,7 +187,7 @@ void initFields(McuMgrScheme scheme, byte[] bytes, McuMgrHeader header, byte[] p
         mBytes = bytes;
         mHeader = header;
         mPayload = payload;
-        mRc = rc;
+        mReturnCode = rc;
     }
 
     /**