[RESTRICT AUTOMERGE] Disallow PINNED in setLaunchWindowingMode

- Throw security exception if setLaunchWindowingMode is called with
  WINDOWING_MODE_PINNED
- Deprecated also test cases that are irrelevant after this change

Flag: EXEMPT security fix
Bug: 388029380
Test: atest PinnedStackTests \
            SafeActivityOptionsTest \
            TaskLaunchParamsModifierTests
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:1732fc2cf246b979c784d705b83d8a4d25b147e0)
Merged-In: I9d37d41af3d86f785fd5d85503b544552b39cac4
Change-Id: I9d37d41af3d86f785fd5d85503b544552b39cac4