(SHIFT) Revert "Settings: Hide "Mainline module version" preference"

This reverts commit 1d481b936f2b7a68075c42695b1ddc0c0991ca45.

We are shipping mainline modules.

Change-Id: I58747e763787d2779ed5d36b9d5d20d7f01da54f
Signed-off-by: Alexander Martinz <amartinz@shiftphones.com>
diff --git a/res/xml/firmware_version.xml b/res/xml/firmware_version.xml
index 4eb25fd..99243a6 100644
--- a/res/xml/firmware_version.xml
+++ b/res/xml/firmware_version.xml
@@ -54,14 +54,12 @@
         settings:controller="com.android.settings.deviceinfo.firmwareversion.LineageVendorSecurityPatchLevelPreferenceController"/>
 
     <!-- Mainline module version -->
-    <!--
     <Preference
         android:key="module_version"
         android:title="@string/module_version"
         android:summary="@string/summary_placeholder"
         settings:enableCopying="true"
         settings:controller="com.android.settings.deviceinfo.firmwareversion.MainlineModuleVersionPreferenceController"/>
-    -->
 
     <!-- Baseband -->
     <Preference