[AW][Dev-UI] generate AwSwitches from aw_switches.cc

No change to logic. This generates AwSwitches.java from aw_switches.cc
using java_cpp_strings.

Fixed: 956803
Test: autoninja -C out/Default system_webview_google_apk
Test: run_webview_instrumentation_test_apk -f=SafeBrowsingTest.*
Change-Id: I1933e812e5206eb8ae087d30e1abf61d2695991a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2343951
Commit-Queue: Nate Fischer <[email protected]>
Reviewed-by: Richard Coles <[email protected]>
Cr-Commit-Position: refs/heads/master@{#796505}
6 files changed