Bump from ScreenReader0 to ScreenReader1.

Change mode from an enumeration/u32 to a string on DBus interface.
Change actions on TriggerAction from u32 to strings also on DBus interface.

data/interfaces/com.steampowered.SteamOSManager1.xml

@@ -305,7 +305,7 @@
       This interface is considered unstable and may change between verisons.
       Once it is considered stable it will be renamed to ScreenReader1
   -->
-  <interface name="com.steampowered.SteamOSManager1.ScreenReader0">
+  <interface name="com.steampowered.SteamOSManager1.ScreenReader1">
     <!--
         Enabled
 
@@ -339,9 +339,9 @@
 
         Which mode the screen reader should operate in.
 
-        Valid modes: 0 - Browse mode, 1 - Focus mode.
+        Valid modes: browse - Browse mode, focus - Focus mode.
     -->
-    <property name="Mode" type="u" access="readwrite"/>
+    <property name="Mode" type="s" access="readwrite"/>
 
     <!--
         Voice
@@ -370,16 +370,16 @@
         Forward a user interaction event to the screen reader service.
 
         @action: The action genereated via user input. Valid values:
-          0 = Stop Talking
-          1 = Read Next Word,
-          2 = Read Previous Word,
-          3 = Read Next Item,
-          4 = Read Previous Item,
-          5 = Move To Next Landmark,
-          6 = Move To Previous Landmark,
-          7 = Move To Next Heading,
-          8 = Move To Previous Heading,
-          9 = Toggle between Browse mode and Focus mode,
+          stop_talking = Stop Talking
+          read_next_word = Read Next Word,
+          read_previous_word = Read Previous Word,
+          read_next_item = Read Next Item,
+          read_previous_item = Read Previous Item,
+          move_to_next_landmark = Move To Next Landmark,
+          move_to_previous_landmark = Move To Previous Landmark,
+          move_to_next_heading = Move To Next Heading,
+          move_to_previous_heading = Move To Previous Heading,
+          toggle_mode = Toggle between Browse mode and Focus mode,
 
         @timestamp: refers to the time the user interaction event
         that triggered this event happened. E.g. when the user pressed
@@ -387,7 +387,7 @@
         start of CLOCK_MONOTONIC_RAW).
     -->
     <method name="TriggerAction">
-      <arg type="u" name="action" direction="in"/>
+      <arg type="s" name="action" direction="in"/>
       <arg type="t" name="timestamp" direction="in"/>
     </method>