Reduce the maximum times the app-to-web education is shown

The `MAXIMUM_TIMES_EDUCATION_SHOWN` constant in `AppToWebEducationFilter` is changed from 100 to 2

Bug: 444678086
Flag: com.android.window.flags.enable_desktop_windowing_app_to_web_education_integration
Test: m
Cherrypick-From: https://googleplex-android-review.googlesource.com/q/commit:b4295c29c417dab2b230b8309855b7a3d6de7dbc
Merged-In: I182a06d07d47ff2ed56fcd883874ef571a9a3141
Change-Id: I182a06d07d47ff2ed56fcd883874ef571a9a3141