Add ChipText composable

This CL adds a custom text field that will be used to show
text in status bar chips. The text only shows if more than
50% of it can be displayed in a chip and has a custom fade out
overflow behavior.

Test: Tested in a composable prototype status bar chip.
See b/372657935 #11 for screenshot.

Bug: b/372657935
Flag: com.android.systemui.status_bar_chips_modernization

Change-Id: I6c989e8bbf62b17c1a0c12fce697e40145852e34