Apply theme to half sheet and clean up

https://screenshot.googleplex.com/67T5pt8gK7hLG4C

Test: Screenshot
Bug: 196262706
Change-Id: Ia4d55f7dfff49993222ac3627851ab89279b51d0
diff --git a/nearby/halfsheet/res/layout/activity_half_sheet.xml b/nearby/halfsheet/res/layout/activity_half_sheet.xml
deleted file mode 100644
index 4915d4b..0000000
--- a/nearby/halfsheet/res/layout/activity_half_sheet.xml
+++ /dev/null
@@ -1,20 +0,0 @@
-<?xml version="1.0" encoding="utf-8" ?>
-<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    xmlns:tools="http://schemas.android.com/tools"
-    xmlns:app="http://schemas.android.com/apk/res-auto">
-
-    <LinearLayout
-        android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        android:orientation="vertical" >
-
-        <TextView
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:text="abc half sheet" />
-    </LinearLayout>
-
-</FrameLayout>
-
diff --git a/nearby/halfsheet/res/layout/fast_pair_app_launch_fragment.xml b/nearby/halfsheet/res/layout/fast_pair_app_launch_fragment.xml
deleted file mode 100644
index ad321b2..0000000
--- a/nearby/halfsheet/res/layout/fast_pair_app_launch_fragment.xml
+++ /dev/null
@@ -1,53 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<android.support.v7.widget.LinearLayoutCompat
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    android:orientation="vertical"
-    android:layout_width="match_parent" android:layout_height="match_parent">
-
-  <android.support.constraint.ConstraintLayout
-      android:id="@+id/image_view"
-      android:layout_width="match_parent"
-      android:layout_height="340dp"
-      android:paddingStart="12dp"
-      android:paddingEnd="12dp"
-      android:paddingTop="12dp">
-    <TextView
-        android:id="@+id/header_subtitle"
-        android:textColor="@color/fast_pair_half_sheet_subtitle_color"
-        android:fontFamily="google-sans"
-        android:textSize="14sp"
-        android:gravity="center"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        app:layout_constraintTop_toTopOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintEnd_toEndOf="parent" />
-
-    <ImageView
-        android:id="@+id/pairing_pic"
-        android:layout_width="@dimen/fast_pair_half_sheet_image_size"
-        android:layout_height="@dimen/fast_pair_half_sheet_image_size"
-        android:paddingTop="18dp"
-        android:paddingBottom="18dp"
-        android:importantForAccessibility="no"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/header_subtitle" />
-
-    <Button
-        android:id="@+id/connect_btn"
-        android:text="@string/fast_pair_app_launch_button"
-        android:layout_height="@dimen/fast_pair_connect_button_height"
-        android:layout_width="@dimen/fast_pair_half_sheet_image_size"
-        android:background="@color/fast_pair_half_sheet_button_color"
-        android:paddingTop="6dp"
-        android:paddingBottom="6dp"
-        app:layout_constraintTop_toBottomOf="@+id/pairing_pic"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        style="@style/HalfSheetButton" />
-
-  </android.support.constraint.ConstraintLayout>
-
-</android.support.v7.widget.LinearLayoutCompat>
diff --git a/nearby/halfsheet/res/values/strings.xml b/nearby/halfsheet/res/values/strings.xml
index a3a2b00..12e3c23 100644
--- a/nearby/halfsheet/res/values/strings.xml
+++ b/nearby/halfsheet/res/values/strings.xml
@@ -15,7 +15,7 @@
   -->
 
 <resources>
-    <string name="app_name">Nearby HalfSheet Dialog</string>
+
     <string name="common_done" description="After pairing process finish button text to dismiss halfsheet">Done</string>
     <string name="common_save">Save</string>
     <string name="common_connect" description="Button text to start connecting process">Connect</string>