[MaterialTimePicker] Buttons at the bottom are getting cut off

Nobody has claimed this yet.

**Description:** `MaterialTimePicker` is getting its buttons cut off
at the bottom in the `1.11.x` releases, this looks correct in `1.10.0-beta01`
so it may be a regression.

I suspect this might improve if those two buttons are also constrained
to `parent` at their bottom edge.

**Expected behavior:** The expected behaviour is that those buttons
would not be clipped. Here are two screenshots - one from `1.10` and
one from `1.11`, notice how the dialog's height is less than it was in `1.10`
and the buttons are clipped:

1.10|1.11
-|-
|

**Source code:** `material_timepicker_dialog.xml`; This may be due to
commit d10201dc88f919421b3bc4d8d7aa432de685c892 which updated the layout

**Minimal sample app repro:** n/a

**Android API version:** 33

**Material Library version:** 1.11.0-alpha02

**Device:** Pixel 6 emulator

To help us triage faster, please check to make sure you are using the [latest version](https://github.com/material-components/material-components-android/releases) of the library.

We also happily accept [pull requests](https://github.com/material-components/material-components-android/pulls).

Start with material_timepicker_dialog.xml and compare its current constraints with the layout before commit d10201dc88f919421b3bc4d8d7aa432de685c892. Check how the bottom buttons are constrained and verify the MaterialTimePicker dialog on Android API 33. Done means both buttons are fully visible rather than clipped.

Written by the indexing model from the issue text.