feat: Respect format's aspect ratio in Preview and add resizeMode prop (#1817)

* feat(preview): respect format's aspect ratio

* fix: code guidelines and previewSize in PreviewView

* feat: add resizeMode 'cover' and 'contain' on Android

package/android/src/main/java/com/mrousavy/camera/CameraViewManager.kt

@@ -7,6 +7,7 @@ import com.facebook.react.uimanager.ViewGroupManager
 import com.facebook.react.uimanager.annotations.ReactProp
 import com.mrousavy.camera.parsers.Orientation
 import com.mrousavy.camera.parsers.PixelFormat
+import com.mrousavy.camera.parsers.ResizeMode
 import com.mrousavy.camera.parsers.Torch
 import com.mrousavy.camera.parsers.VideoStabilizationMode
 
@@ -128,6 +129,14 @@ class CameraViewManager : ViewGroupManager<CameraView>() {
     view.format = format
   }
 
+  @ReactProp(name = "resizeMode")
+  fun setResizeMode(view: CameraView, resizeMode: String) {
+    val newMode = ResizeMode.fromUnionValue(resizeMode)
+    if (view.resizeMode != newMode)
+      addChangedPropToTransaction(view, "resizeMode")
+    view.resizeMode = newMode
+  }
+
   // TODO: Change when TurboModules release.
   // We're treating -1 as "null" here, because when I make the fps parameter
   // of type "Int?" the react bridge throws an error.