Update non-framework emergency location request notification

- Incorporate notification text feedback in b/116328114 so that
  it translates well in different locales.
- Implement PWG recommendation to always notify user of non-framework
  location requests and not make it configurable. Remove es_notify_int
  configuration parameter.

Bug: 116328114
Bug: 130892418
Test: Manual plus existing tests pass.
Change-Id: Iad972eb1a6fe6c6ed5646edb00c1ea483a077553