Fix stale header height being used in scroll to header calculation

- This fixes the inconsistency of how far down is needed to scroll to since
the values used to calculate the header during drawOnScrimWithScaleAndBottomOffset() is faulty.
- Tweaked the row to scroll to when there are tabs vs no tabs. When there are no tabs, its possible the
header gets cut off most of the time hence subtracting by 1 will help this problem.

bug:332543940
Test locally: https://screenshot.googleplex.com/5y4vYiQcnSMKcA6
manual - before: https://drive.google.com/file/d/14Zj_FyO-3bVfXwuxaqgG_DXMELYS5bQn/view?usp=sharing
after with tabs:
after 5x5: https://drive.google.com/file/d/16rjaut6VqBMxG6uLQSnVTLRhUQnAANZ5/view?usp=sharing
after 4x5: https://drive.google.com/file/d/16jCPN8BewwuIQobt0t6tdVouUKpp1CdI/view?usp=sharing
after 4x4: https://drive.google.com/file/d/16VFQb5s6IfrpjRU9PmLlAJWjh1zIo77o/view?usp=sharing
after 3x3: https://drive.google.com/file/d/16VFQb5s6IfrpjRU9PmLlAJWjh1zIo77o/view?usp=sharing
after 2x2: https://drive.google.com/file/d/16N6Myuv9VtXgI1p4sIuV23iupea7jYLQ/view?usp=sharing

after no tabs:
after 5x5: https://drive.google.com/file/d/17H1oF_9fJnrtSqmJJqQyyn4upuM2CsoG/view?usp=sharing
after 4x5: https://drive.google.com/file/d/178Vu3SvnvSPODIfaR0oz6-jPVYDDNMaA/view?usp=sharing
after 4x4: https://drive.google.com/file/d/16yt_5ePPR7kwSrZlo5Sj3x0DqHoQKqYP/view?usp=sharing
after 3x3: https://drive.google.com/file/d/17HqebtHWcEHg-i9AfqHEVdl4YnQhX06P/view?usp=sharing
after 2x2: https://drive.google.com/file/d/17HqebtHWcEHg-i9AfqHEVdl4YnQhX06P/view?usp=sharing

after tablet:
landscape: https://drive.google.com/file/d/16JQGs0A3ifKpgqrpQwIzssrXbH-OC0Ej/view?usp=sharing
portrait: https://drive.google.com/file/d/16LmLnOEB6XkuAkAcgvP2mKHe5QQqG1oh/view?usp=sharing

Flag: ACONFIG com.android.launcher3.Flags.private_space_animation TRUNKFOOD

Change-Id: If8a70cc71e9cff4a7f8d3b648e3e59c414e40ee5