Add Full Immersive Mode support for API 19+

Added immersive mode to the browser. Previous
implementation was from 2011 and would only
hide the status bar. Now we hide the entire
System UI where supported (api 19+).

Change-Id: I5b3c6079c38bd2035c3bf9ce60887ff85ccfa2a2
diff --git a/res/values-zh-rCN/strings.xml b/res/values-zh-rCN/strings.xml
index 1cb4191..a932568 100644
--- a/res/values-zh-rCN/strings.xml
+++ b/res/values-zh-rCN/strings.xml
@@ -290,7 +290,7 @@
     <string name="pref_use_instant_search" msgid="1119176077760723740">"Google 即搜即得"</string>
     <string name="pref_use_instant_search_summary" msgid="839320474961917522">"借助 Google 即搜即得,您可以在使用 Google 搜索时一边键入内容一边查看结果(此功能可能会增加数据使用量)。"</string>
     <string name="pref_lab_fullscreen" msgid="8173609016657987973">"全屏"</string>
-    <string name="pref_lab_fullscreen_summary" msgid="7694738112219376740">"使用全屏模式可隐藏状态栏"</string>
+    <string name="pref_lab_fullscreen_summary" msgid="7694738112219376740">"使用全屏模式</string>
     <string name="pref_data_title" msgid="7255058703417796578">"带宽管理"</string>
     <string name="pref_data_preload_title" msgid="4479320472980292873">"搜索结果预加载"</string>
   <string-array name="pref_data_preload_choices">
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 89df52d..8090344 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -646,10 +646,10 @@
       Use Google Instant when you use Google Search, to show results as you
       type (this can increase data use).</string>
     <!-- Title for the fullscreen lab feature [CHAR LIMIT=40] -->
-    <string name="pref_lab_fullscreen">Fullscreen</string>
+    <string name="pref_lab_fullscreen">Immersive</string>
     <!-- Summary for the fullscreen lab feature [CHAR LIMIT=120] -->
     <string name="pref_lab_fullscreen_summary">
-      Use fullscreen mode to hide the status bar</string>
+      Make the browser fullscreen</string>
     <!-- Title for bandwidth management preference [CHAR LIMIT=25] -->
     <string name="pref_data_title">Bandwidth management</string>
     <!-- Title for search preloading [CHAR LIMIT=40] -->