updater_sample: update ui and README, clean-up

- ui: add text view for latest completion (error) code
- update README.md
- update MainActivity.java
- remove AbNonStreamingUpdate

Test: mmma bootable/recovery/updater_sample
Change-Id: Ie9bb64211c57d536036b04f13896e4937c392b6e
Signed-off-by: Zhomart Mukhamejanov <zhomart@google.com>
diff --git a/updater_sample/res/layout/activity_main.xml b/updater_sample/res/layout/activity_main.xml
index 3cd7721..7a12d34 100644
--- a/updater_sample/res/layout/activity_main.xml
+++ b/updater_sample/res/layout/activity_main.xml
@@ -114,7 +114,7 @@
                     android:id="@+id/textView"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
-                    android:text="Running update status:" />
+                    android:text="Update status:" />
 
                 <TextView
                     android:id="@+id/textViewStatus"
@@ -124,6 +124,28 @@
                     android:text="@string/unknown" />
             </LinearLayout>
 
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="4dp"
+                android:orientation="horizontal">
+
+                <TextView
+                    android:id="@+id/textView2"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="Update completion:" />
+
+                <TextView
+                    android:id="@+id/textViewCompletion"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginLeft="8dp"
+                    android:text="@string/unknown" />
+            </LinearLayout>
+
+
             <ProgressBar
                 android:id="@+id/progressBar"
                 style="?android:attr/progressBarStyleHorizontal"