[android] Remove unused SPIRV strings and make strings check run on PRs (#3885)

I reorganized my runners so it shouldn't be an issue anymore

Signed-off-by: crueter <crueter@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3885
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>

.forgejo/workflows/strings.yml

@@ -3,6 +3,8 @@ name: Check Strings
 on:
   push:
     branches: [ master ]
+  pull_request:
+    branches: [ master ]
 
 jobs:
   check-strings:
@@ -10,7 +12,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          fetch-depth: 0
+          fetch-depth: 1
 
       - name: Find Unused Strings
         run: ./tools/unused-strings.sh