WebView: add AOSP WebView to the required apps allowlist

This adds com.android.webview (the AOSP WebView package) to the required
apps allowlists. A valid WebView package is required to be installed and
enabled for all Android profiles on the device in order for Android apps
to be able to use `android.webkit.*` framework APIs.

Bug: 260973340
Test: None
Flag: RESOURCES_ONLY
Change-Id: I864d4d0449924b9b70392f7464eebb1295af7400
3 files changed