Introduce ActionBar in picker screens

This change focuses on phone screens. Tablet UI fix will be
done later.

- show SearchView on the action bar
- show "create new contact" as a menu on the split action bar
- keep "create new contact" button for tablet support.
- a few visual tweaks for phone

Also this removes "show all contacts" item in JoinContactActivity.
Now all contacts are shown by default.

Bug: 5394377
Change-Id: I82e59b374888d522c81cd4957cb3fde286b419f6
diff --git a/res/layout/join_contact_picker_section_header.xml b/res/layout/join_contact_picker_section_header.xml
new file mode 100644
index 0000000..50dac70
--- /dev/null
+++ b/res/layout/join_contact_picker_section_header.xml
@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2011 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+
+<!-- Layout used for "Join contacts" screen's section headers. -->
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="vertical">
+
+    <TextView
+        android:id="@+id/text"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:minHeight="32dip"
+        android:paddingLeft="?attr/list_item_header_text_indent"
+        android:textAppearance="?android:attr/textAppearanceSmall"
+        android:textAllCaps="true"
+        android:textStyle="bold"
+        android:singleLine="true"
+        android:ellipsize="end"
+        android:gravity="center_vertical" />
+
+    <View style="@style/SectionDivider" />
+</LinearLayout>