[camera_android_camerax] Force new Surface for each SurfaceRequest (#9360)

> [!IMPORTANT]  
> flutter/flutter#169899 must be rolled into packages in order for this fix to land.

Since timing for `Surface` requests cannot be guaranteed, request a new `Surface` from `SurfaceProducer.getSurface` each time a `Surface` is requested for rendering the camera preview to.

Fixes flutter/flutter#155294.
Fixes flutter/flutter#169506.

## Pre-Review Checklist

[^1]: Regular contributors who have demonstrated familiarity with the repository guidelines only need to comment if the PR is not auto-exempted by repo tooling.

Author: camsim99

packages/camera/camera_android_camerax/CHANGELOG.md

@@ -1,3 +1,8 @@
+## 0.6.19
+
+* Ensures that a new surface is provided every time that one is requested to render the camera preview
+  to fix pausing and resuming the preview.
+
 ## 0.6.18+3
 
 * Fixes incorrect camera preview mirroring for front cameras of devices using the Impeller backend.

packages/camera/camera_android_camerax/android/src/main/java/io/flutter/plugins/camerax/PreviewProxyApi.java

@@ -121,7 +121,7 @@ public void onSurfaceCleanup() {
       // Provide surface.
       surfaceProducer.setSize(
           request.getResolution().getWidth(), request.getResolution().getHeight());
-      Surface flutterSurface = surfaceProducer.getSurface();
+      Surface flutterSurface = surfaceProducer.getForcedNewSurface();
       request.provideSurface(
           flutterSurface,
           Executors.newSingleThreadExecutor(),

packages/camera/camera_android_camerax/android/src/test/java/io/flutter/plugins/camerax/PreviewTest.java

@@ -103,7 +103,7 @@ TextureRegistry getTextureRegistry() {
         ArgumentCaptor.forClass(TextureRegistry.SurfaceProducer.Callback.class);
 
     when(mockSurfaceRequest.getResolution()).thenReturn(new Size(5, 6));
-    when(mockSurfaceProducer.getSurface()).thenReturn(mock(Surface.class));
+    when(mockSurfaceProducer.getForcedNewSurface()).thenReturn(mock(Surface.class));
 
     final Preview.SurfaceProvider previewSurfaceProvider =
         api.createSurfaceProvider(mockSurfaceProducer, mockSystemServicesManager);
@@ -155,7 +155,7 @@ TextureRegistry getTextureRegistry() {
 
     when(mockSurfaceRequest.getResolution())
         .thenReturn(new Size(resolutionWidth, resolutionHeight));
-    when(mockSurfaceProducer.getSurface()).thenReturn(mockSurface);
+    when(mockSurfaceProducer.getForcedNewSurface()).thenReturn(mockSurface);
 
     final ArgumentCaptor<Surface> surfaceCaptor = ArgumentCaptor.forClass(Surface.class);
     final ArgumentCaptor<Consumer<SurfaceRequest.Result>> consumerCaptor =

packages/camera/camera_android_camerax/pubspec.yaml

@@ -2,7 +2,7 @@ name: camera_android_camerax
 description: Android implementation of the camera plugin using the CameraX library.
 repository: https://github.com/flutter/packages/tree/main/packages/camera/camera_android_camerax
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+camera%22
-version: 0.6.18+3
+version: 0.6.19
 
 environment:
   sdk: ^3.7.0