[MaterialDatePicker] Labels are not internationalized

[nominalista]

Description: Each label occurs only in English, e.g. "Start date", "End date", "Cancel", "OK", etc. What's more the only way to change these texts is to override private string values, e.g. mtrl_picker_range_header_unselected.

Expected behavior: Either some customization or auto-internationalization of labels.

Material Library version: 1.1.0-r01

[pekingme]

Hi @nominalista , auto-internationalization is kept low priority for current development phase. To customize these labels for other locales, please defines the corresponding string with the same resource names in the various locale resource directories.

How to use resources for localizations:
https://developer.android.com/guide/topics/resources/localization#using-framework

Resource names of used labels can be found here:
https://github.com/material-components/material-components-android/blob/master/lib/java/com/google/android/material/datepicker/res/values/strings.xml