"=" doesn't work in case of voice commands

**Summary:** 

The "=" button doesn't work after giving a voice command but works in case of manual input

**Steps to reproduce:** 


**Expected behavior:** 

Output in case of voice command
**Observed behavior:** 

The voice commands do not give output when "=" is pressed.

**Device and Android version:** 

Redmi Note 4 (Android 7.0)





