Correcting typo in doc of MEDIA_XXX intents

Correcting typo in documents of MEDIA_MOUNTED,
MEDIA_UNMOUNTED,MEDIA_UNMOUNTABLE intents, which
may be confusing to APP developers.

Change-Id: Id909b7bfad98e305b8054978f054f4fb9b705311
TIME_TICK was not occurred for one hour

TIME_TICK was not occurred at the end of DST for one hour

Step to reproduce:
1. Settings -> Date & time
2. uncheck Automatic date & time and Automatic time zone
3. select Time zone -> select Brussels
4. set date -> Oct. 28. 2012
5. set time -> 1:59 AM

Bug: 7922117
Change-Id: I2e78bd97b508d6a38471425cfbaca45fb4b89c1e