Android: Add "Prefer VS for Point/Line Expansion" to GUI

This adds PR 10890's new setting to the Android GUI. I'm curious to see
if any Android users might get a performance improvement from it.

Due to how our settings work on Android, I haven't implemented disabling
the checkbox when the graphics backend doesn't support both GS and VS
for point/line expansion, but I don't think that's critical to have.

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

@@ -341,6 +341,8 @@
     <string name="progressive_scan">Enable Progressive Scan</string>
     <string name="backend_multithreading">Backend Multithreading</string>
     <string name="backend_multithreading_description">Enables graphics backend multithreading (Vulkan only). May affect performance. If unsure, leave this checked.</string>
+    <string name="prefer_vs_for_point_line_expansion">Prefer VS for Point/Line Expansion</string>
+    <string name="prefer_vs_for_point_line_expansion_description">On backends that support both using the geometry shader and the vertex shader for expanding points and lines, selects the vertex shader for the job. May affect performance.</string>
     <string name="defer_efb_invalidation">Defer EFB Cache Invalidation</string>
     <string name="defer_efb_invalidation_description">Defers invalidation of the EFB access cache until a GPU synchronization command is executed. May improve performance in some games at the cost of stability. If unsure, leave this unchecked.</string>
     <string name="manual_texture_sampling">Manual Texture Sampling</string>