UpdatesFragment: Move Update All button to FAB

* Also link BlacklistFragment in in it's place as requested by users

Signed-off-by: Aayush Gupta <aayushgupta219@gmail.com>

app/src/main/res/layout/fragment_updates.xml

@@ -40,4 +40,19 @@
             app:stackFromEnd="false"
             tools:listitem="@layout/view_app_list" />
     </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
-</RelativeLayout>
+
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
+        android:id="@+id/update_fab"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignParentEnd="true"
+        android:layout_alignParentBottom="true"
+        android:layout_margin="@dimen/margin_large"
+        android:contentDescription="@string/action_search"
+        android:text="@string/action_update_all"
+        android:textColor="@color/colorWhite"
+        android:visibility="gone"
+        app:backgroundTint="?colorAccent"
+        app:srcCompat="@drawable/ic_installation"
+        app:tint="@color/colorWhite" />
+</RelativeLayout>

app/src/main/res/layout/view_header_update.xml

@@ -59,5 +59,5 @@
         android:layout_marginStart="@dimen/margin_small"
         android:layout_marginEnd="@dimen/margin_small"
         android:padding="@dimen/padding_xsmall"
-        android:text="@string/action_update_all" />
+        android:text="@string/action_manage" />
 </RelativeLayout>

app/src/main/res/values/strings.xml

@@ -402,4 +402,5 @@
     <string name="device_doze_description">Please, disable battery optimizations to allow background operations.</string>
     <string name="device_doze_extra">Optionally you can choose to keep the optimizations enabled, but then you won\'t be able to take benefit of background downloads and automated updates, so choice is yours.</string>
     <string name="failed_apk_export">Failed to export APKs</string>
+    <string name="action_manage">Manage</string>
 </resources>