Remove custom Preference.Header layout.

This custom adapter was legacy from our implementation of Material
design, but we should use the system default styling now.

Bug: 19529041
Change-Id: Ie30e283bdc00895746c429a337cad19a95ac6b0f
2 files changed
tree: d8bb7d675486611ae3555dc7c879d42882217495
  1. res/
  2. src/
  3. tests/
  4. Android.mk
  5. AndroidManifest.xml
  6. proguard.flags