fix: allow back navigation to dismiss tip card

Signed-off-by: Brandon McAnsh <git@bmcreations.dev>

Author: bmc08gt

app/src/main/java/com/getcode/view/main/home/HomeScan.kt

@@ -2,6 +2,7 @@ package com.getcode.view.main.home
 
 import android.Manifest
 import android.app.Activity
+import androidx.activity.compose.BackHandler
 import androidx.compose.animation.AnimatedContent
 import androidx.compose.animation.AnimatedVisibility
 import androidx.compose.animation.EnterExitState
@@ -450,6 +451,10 @@ private fun BillContainer(
                     canCancel = true
                 }
             }
+
+            BackHandler(updatedState.billState.bill is Bill.Tip && canCancel) {
+                homeViewModel.cancelSend()
+            }
         }
 
         //Bill Received Bottom Dialog

app/src/main/java/com/getcode/view/main/home/HomeViewModel.kt

@@ -199,7 +199,6 @@ class HomeViewModel @Inject constructor(
     private val cashLinkManager: CashLinkManager,
     private val permissionChecker: PermissionChecker,
     private val notificationManager: NotificationManagerCompat,
-    private val codeScanner: KikCodeScannerImpl,
     appSettings: AppSettingsRepository,
     betaFlagsRepository: BetaFlagsRepository,
     features: FeatureRepository,