fix(test): correct MockK static mock pattern for OAuth2.exchangeCode

TokenErrorResponse.error and .errorDescription are public Java fields,
not methods. MockK's every { } block only intercepts method calls, so
using every { mock.error } returns value triggers "Missing mocked calls
inside every { ... } block". Fix by directly assigning the fields on
the relaxed mock instance instead.

Author: JohnsonEricAtSalesforce

libs/test/SalesforceSDKTest/src/com/salesforce/androidsdk/auth/LoginActivityAuthErrorTest.kt

@@ -88,8 +88,8 @@ class LoginActivityAuthErrorTest {
     @Test
     fun onAuthFlowError_givenClientBlocked_broadcastsWithCorrectExtras() {
         val tokenErrorResponse = mockk<OAuth2.TokenErrorResponse>(relaxed = true)
-        every { tokenErrorResponse.error } returns CLIENT_BLOCKED_ERROR
-        every { tokenErrorResponse.errorDescription } returns "App is blocked by admin"
+        tokenErrorResponse.error = CLIENT_BLOCKED_ERROR
+        tokenErrorResponse.errorDescription = "App is blocked by admin"
         val oauthException = OAuthFailedException(tokenErrorResponse, 403)
 
         every {
@@ -139,8 +139,8 @@ class LoginActivityAuthErrorTest {
     @Test
     fun onAuthFlowError_givenClientBlocked_showsAppBlockedToast() {
         val tokenErrorResponse = mockk<OAuth2.TokenErrorResponse>(relaxed = true)
-        every { tokenErrorResponse.error } returns CLIENT_BLOCKED_ERROR
-        every { tokenErrorResponse.errorDescription } returns "App is blocked"
+        tokenErrorResponse.error = CLIENT_BLOCKED_ERROR
+        tokenErrorResponse.errorDescription = "App is blocked"
         val oauthException = OAuthFailedException(tokenErrorResponse, 403)
 
         every {
@@ -176,8 +176,8 @@ class LoginActivityAuthErrorTest {
     @Test
     fun onAuthFlowError_givenGenericOAuthError_broadcastsWithCorrectExtras() {
         val tokenErrorResponse = mockk<OAuth2.TokenErrorResponse>(relaxed = true)
-        every { tokenErrorResponse.error } returns "invalid_grant"
-        every { tokenErrorResponse.errorDescription } returns "Expired authorization code"
+        tokenErrorResponse.error = "invalid_grant"
+        tokenErrorResponse.errorDescription = "Expired authorization code"
         val oauthException = OAuthFailedException(tokenErrorResponse, 400)
 
         every {

libs/test/SalesforceSDKTest/src/com/salesforce/androidsdk/auth/LoginViewModelMockTest.kt

@@ -802,8 +802,8 @@ class LoginViewModelMockTest {
         mockkStatic(OAuth2::class)
 
         val tokenErrorResponse = mockk<OAuth2.TokenErrorResponse>(relaxed = true)
-        every { tokenErrorResponse.error } returns OAuth2.CLIENT_BLOCKED_ERROR
-        every { tokenErrorResponse.errorDescription } returns "App is blocked"
+        tokenErrorResponse.error = OAuth2.CLIENT_BLOCKED_ERROR
+        tokenErrorResponse.errorDescription = "App is blocked"
         val oauthException = OAuth2.OAuthFailedException(tokenErrorResponse, 403)
 
         every {
@@ -863,8 +863,8 @@ class LoginViewModelMockTest {
         mockkStatic(OAuth2::class)
 
         val tokenErrorResponse = mockk<OAuth2.TokenErrorResponse>(relaxed = true)
-        every { tokenErrorResponse.error } returns "invalid_grant"
-        every { tokenErrorResponse.errorDescription } returns "Expired authorization code"
+        tokenErrorResponse.error = "invalid_grant"
+        tokenErrorResponse.errorDescription = "Expired authorization code"
         val oauthException = OAuth2.OAuthFailedException(tokenErrorResponse, 400)
 
         every {