[*] basic in-house cpp linting (#4039)

- add `#pragma once` to remainder files
- "correcter" defines (ANDROID), see https://groups.google.com/g/android-ndk/c/cf9_f1SLXls
- extra miscelly fixups

Signed-off-by: lizzie <lizzie@eden-emu.dev>

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4039
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Reviewed-by: crueter <crueter@eden-emu.dev>

src/shader_recompiler/backend/spirv/emit_spirv_image.cpp

@@ -506,7 +506,7 @@ Id EmitImageSampleExplicitLod(EmitContext& ctx, IR::Inst* inst, const IR::Value&
     Id result = Emit(&EmitContext::OpImageSparseSampleExplicitLod,
                      &EmitContext::OpImageSampleExplicitLod, ctx, inst, ctx.F32[4],
                      Texture(ctx, info, index), coords, operands.Mask(), operands.Span());
-#ifdef ANDROID
+#ifdef __ANDROID__
     if (Settings::values.fix_bloom_effects.GetValue()) {
         result = ctx.OpVectorTimesScalar(ctx.F32[4], result, ctx.Const(0.98f));
     }