Add string resource

(for frame rate per second setting)

Author: MHShetty

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

@@ -185,4 +185,5 @@
 
     <string name="zsl_setting_title">Use ZSL in Latency mode</string>
     <string name="zsl_setting_desc">Uses Zero Shutter Lag (ZSL) in Latency mode for faster capture. Certain devices may have a buggy implementation for this.</string>
+    <string name="video_frame_rate">Video Frame Rate</string>
 </resources>