Fixes #2747 - TTS distances should use Android plurals

**Questions:**

@samueltardieu, @RomNexus6, @Robert, @YraFyra

Please search the strings.xml (fr, it, sv) for "plurals" and check if the new plurals (item = other) and the singulars (item = one) are correct. These texts are not for displaying, but for speaking compass. The swedish are wrong, I just copied them.

**French**: Is it "0 metrè" or "0 metrès"? Is it "0 pied" or "0 pieds"? Android says it's singular.

**French, Italian, Swedish**: What is the correct writing for headings like "1 o'clock", "2 o'clock"? For example: is it "un heure" and "deux heures"?


Please also check TextFactoryTest to see, how c:geo will speak with these new plurals. I didn't add a Test for swedish, because I know, that the plurals are wrong.