Try to avoid some Webview-related crashes

Related to #5218

app/src/main/java/eu/kanade/tachiyomi/App.kt

@@ -9,6 +9,7 @@ import android.content.Intent
 import android.content.IntentFilter
 import android.content.res.Configuration
 import android.os.Build
+import android.webkit.WebView
 import androidx.core.app.NotificationManagerCompat
 import androidx.core.content.getSystemService
 import androidx.lifecycle.Lifecycle
@@ -56,6 +57,12 @@ open class App : Application(), LifecycleObserver, ImageLoaderFactory {
             Security.insertProviderAt(Conscrypt.newProvider(), 1)
         }
 
+        // Avoid potential crashes
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
+            val process = getProcessName()
+            if (packageName != process) WebView.setDataDirectorySuffix(process)
+        }
+
         Injekt.importModule(AppModule(this))
 
         setupAcra()

app/src/main/java/eu/kanade/tachiyomi/network/interceptor/CloudflareInterceptor.kt

@@ -153,6 +153,7 @@ class CloudflareInterceptor(private val context: Context) : Interceptor {
 
             webView?.stopLoading()
             webView?.destroy()
+            webView = null
         }
 
         // Throw exception if we failed to bypass Cloudflare