Dialer: truncate hint text for search box

There's not enough space on hdpi if voice search is enabled.
Showing truncated text is better than showing truncated 2 lines.

Before: http://imgur.com/aSUJm7X
After: http://imgur.com/LthsLsh

Change-Id: I2f140b2e61d575ea0c745bd95eb48b9950602316
Contacts/Dialer/InCallUI: Dark theme, (4/7):

Part 2/7: frameworks/base
Part 2/7: Contacts
Part 3/7: ContactsCommon
Part 4/7: Dialer
Part 5/7: InCallUI
Part 6/7: PhoneCommon
Part 7/7: services/Telephony