Add NeverDecreaseWidth modifier

This CL extracts the private modifier in ChronometerText into
its own file so we can reuse it in other Chip composables. This
will be needed for certain usages of ChipText

Test: No test needed, no change in implementation.
Bug: b/372657935
Flag: com.android.systemui.status_bar_chips_modernization

Change-Id: I6092b93f4098467e5c6f7566f4d973d06f2a58f0