Minor searchbar improvements

- Don't place cursor at center, looks out of place
- Add a hint text as well

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

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

@@ -44,7 +44,7 @@
         android:layout_toStartOf="@id/img_action_secondary"
         android:layout_toEndOf="@id/img_action_primary"
         android:background="@drawable/bg_search"
-        android:gravity="center_horizontal|center_vertical"
+        android:hint="@string/search_hint"
         android:imeOptions="flagNoExtractUi|actionSearch"
         android:inputType="text"
         android:paddingStart="@dimen/padding_large"

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

@@ -412,4 +412,5 @@
     <string name="open_in_aurora">Open in Aurora Store</string>
     <string name="spoof_property"><xliff:g id="manufacturer">%1$s</xliff:g> • API <xliff:g id="api">%2$s</xliff:g></string>
     <string name="permissions_denied">Required permissions were denied. Please grant them in order to continue the action</string>
+    <string name="search_hint">Search for Apps &amp; Games</string>
 </resources>