setting snackbar button color to accent color (#794)

Author: cmonfortep

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

@@ -293,4 +293,8 @@
         <item name="android:textSize">12sp</item>
     </style>
 
+    <style name="snackbarButtonStyle" parent="Widget.MaterialComponents.Button.TextButton.Snackbar">
+        <item name="android:textColor">?attr/colorAccent</item>
+    </style>
+
 </resources>

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

@@ -30,6 +30,7 @@
         <item name="android:windowActivityTransitions">true</item>
         <item name="autoCompleteTextViewStyle">@style/AutoCompleteTextViewStyle</item>
         <item name="android:statusBarColor">?colorPrimary</item>
+        <item name="snackbarButtonStyle">@style/snackbarButtonStyle</item>
     </style>
 
     <style name="AppTheme.BaseDark">