Remove digit position inversion check

I suspect this was nessecary for the version in AnimatableClockView
to correctly position glyphs in RTL when returning to center, but it
appears to be source of the error as it is only triggered by RTL
returns to center. This also let me simplify the local code a bit.

Bug: 378929812
Test: Checked RTL clock stepping animation
Flag: com.android.systemui.shared.clock_reactive_variants
Change-Id: Ie19dfad60735c6a1ceeb571356ef55876b3f39c4