keystore_cli_v2: allow newlines in the text prompt

Bug: 265929257
Test: manual; keystore_cli_v2 confirmation --prompt_text='HELLO\nWORLD' --extra_data=aa --locale=en --ui_options=
Change-Id: Ib7e2cbe31a00dbb386e690122a8f63f78601dfed
1 file changed