[Provider Model] Adjust the width of the progress bar

- When the display size is enlarged, the progress bar will also be
enlarged. Adjust the width of the progress bar to 152dp.

- See b/211537946#comment11 for a screenshot.

Bug: 211537946
Test: manual test
atest -c InternetAdapterTest \
         InternetDialogControllerTest \
         InternetDialogTest

Change-Id: Ief4fabf4c8d485611927d1cfb2c9a4b1b10f2fa4