Add click listener to search icon.

This way, if the user taps on the icon they will enter the search
UI... increases the surface area for this interaction slightly.

While I was at it, I also changed an unnecessary class variable to
be scoped within onCreate.

Bug: 15457217
Change-Id: I07796eb3f49595b136a2a075d9039a7b899c7819
1 file changed
tree: 8da8d898c6a6d5dbaa23fbabcdd401afabcf1fb8
  1. res/
  2. src/
  3. tests/
  4. Android.mk
  5. AndroidManifest.xml
  6. proguard.flags