Put education changes under new flag

Education feature might be released after the APIs that were added, so
the changes need to be put under a new flag.

Test: m
Bug: 359226240
Flag: com.android.window.flags.enable_desktop_windowing_app_to_web_education_integration
Change-Id: I30115487d8571f343bd965c1713b0362e4afcfa3
3 files changed