Chinese Location Lookup [2/2] Telephony: Detect external plugin.

Change-Id: I9ee3f925af09a5689ad7b72a2f1c2e1925fa3433
Add setting for t9 search input locale

Change-Id: Ic0b97bab0279047cf7598f2c0c805a6975c65345
Kill camel case in dialpad t9 search labels

Change-Id: I3e655e94b28f140ce0258d1e8ad9c94f5b92349f