Disable long press to expand on shade on lockscreen

Long press works on an unlocked phone, but it only works the first
time on Lockscreen with the recent slate of flags enabled, after
which it expands to a broken state. Once we figure out why this is
happening, we will re-enable it.

Bug: 407098346
Test: Manual
Flag: com.android.systemui.shade_expands_on_status_bar_long_press
Change-Id: I043321dce8561c8cff51572d83d64ebcf67a6178