WebView: Add set/getAlgorithmicDarkening APIs

This patch also deprecates the force dark mode API.

WebView can't add CTS test right now because the API's implementation
is in Chromium, WebView needs to first define the API in framework,
then land the change and drop the APK, afterward, CTS test will be
added.

Add compat-framework support for this evolution behavior.

Bug: 214741472
Test: m, m offline-sdk-docs
CTS-Coverage-Bug: 214742132
Change-Id: I5d254deb1f27655ea909fceaa5b09a081d71c763