Visual design: snackbar (#6020)

Task/Issue URL:
https://app.asana.com/1/137249556945/project/72649045549333/task/1209909977029784?focus=true

### Description
This PR fixes the wrong position of the snackbar in both prod and visual
design world

### UI changes
| Before  | After |
| ------ | ----- |

|![Screenshot_20250507_155154](https://github.com/user-attachments/assets/bf1a064b-23df-48cc-807f-63e26fc8d96e)|![Screenshot_20250507_172650](https://github.com/user-attachments/assets/d6b5e1b6-5919-4b8f-adaf-7bf62b9600b1)|

| Before  | After |
| ------ | ----- |

|![Screenshot_20250507_155105](https://github.com/user-attachments/assets/963e5397-4fd2-4bf5-aa37-4ed4e216ddc4)|![Screenshot_20250507_172901](https://github.com/user-attachments/assets/47ea5405-0f33-4220-b170-e7b835fed19a)|

Author: malmstein

app/src/main/java/com/duckduckgo/app/browser/omnibar/TopAppBarBehavior.kt

@@ -16,13 +16,16 @@
 
 package com.duckduckgo.app.browser.omnibar
 
+import android.annotation.SuppressLint
 import android.content.Context
 import android.util.AttributeSet
+import android.view.Gravity
 import android.view.View
 import android.view.ViewGroup.MarginLayoutParams
 import androidx.coordinatorlayout.widget.CoordinatorLayout
 import com.duckduckgo.app.browser.R
 import com.google.android.material.appbar.AppBarLayout
+import com.google.android.material.snackbar.Snackbar
 
 /*
  * This custom behavior prevents the top omnibar from hiding everywhere except for the browser view (i.e. the autocomplete suggestions)
@@ -41,8 +44,11 @@ class TopAppBarBehavior(
         )
     }
 
+    @SuppressLint("RestrictedApi")
     override fun layoutDependsOn(parent: CoordinatorLayout, child: AppBarLayout, dependency: View): Boolean {
-        if (!viewsExemptedFromOffset.contains(dependency.id)) {
+        if (dependency is Snackbar.SnackbarLayout) {
+            updateSnackbar(child, dependency)
+        } else if (!viewsExemptedFromOffset.contains(dependency.id)) {
             offsetBottomByToolbar(dependency)
         }
 
@@ -65,6 +71,23 @@ class TopAppBarBehavior(
         }
     }
 
+    @SuppressLint("RestrictedApi")
+    private fun updateSnackbar(child: View, snackbarLayout: Snackbar.SnackbarLayout) {
+        if (snackbarLayout.layoutParams is CoordinatorLayout.LayoutParams) {
+            val params = snackbarLayout.layoutParams as CoordinatorLayout.LayoutParams
+
+            params.anchorId = R.id.navigationBar
+            params.anchorGravity = Gravity.TOP
+            params.gravity = Gravity.TOP
+            snackbarLayout.layoutParams = params
+
+            // add a padding to the snackbar to avoid it touching the anchor view
+            if (snackbarLayout.translationY == 0f) {
+                snackbarLayout.translationY -= child.context.resources.getDimension(com.duckduckgo.mobile.android.R.dimen.keyline_2)
+            }
+        }
+    }
+
     private fun offsetBottomByToolbar(view: View?) {
         val omnibarHeight = omnibar.measuredHeight()
         if (omnibarHeight > 0 && view is View && view.layoutParams is MarginLayoutParams) {