Currently, I would like to create an application that uses the camera function in Android Studio. However, even though Sync and Build are working fine, I am running into trouble that the emulator does not start. I think the Android Manifest issue is one of the possible causes.

Unresolved package'content'
Unresolved class'FileProvider' (both in provider in AndroidManifest)

package="com.example.cameraapp">

android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">

android:name="android.support.v4.content.FileProvider"
android:authorities="com.example.cameraapp"
android:exported="false"
android:grantUriPermissions="true">
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/file_path"
/>

Open AVD Manager → Open the settings of Pixel API 29 and changed Front and Back of Camera to "Emulated", but it did not change in particular.

Android Studio 3.6.3

About the emulator used
・Pixel2 API 29
・Resolution:1080×1920:420dpi
・Target:Android 10.0
・CPU: x86

buildToolsVersion:29.0.3
minSdkVersion:29
targetSdkVersion:29