[PS] Disable long press for install app button.

For Install button - Disable long press would also disable drag logic altogether.
For apps in PS - Long press is not disabled as it. Drag is disabled in ag/25898351.

Video: https://drive.google.com/file/d/1g5jJ2vebZdiKUwjDMfkUnLwQ1oK1fWXB/view?usp=sharing

Bug: 332572841
Test: manual
Flag: aconfig com.android.launcher3.private_space_app_installer_button trunkfood
Change-Id: I418a31785b25c4f19dde2136747a74811628e92f