apps: lc-compliance: Put tests into anonymous namespace

There is no reason for these symbols to be global.

Signed-off-by: Barnabás Pőcze <pobrn@protonmail.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>

src/apps/lc-compliance/tests/capture_test.cpp

@@ -14,6 +14,8 @@
 
 #include "environment.h"
 
+namespace {
+
 using namespace libcamera;
 
 const std::vector<int> NUMREQUESTS = { 1, 2, 3, 5, 8, 13, 21, 34, 55, 89 };
@@ -134,3 +136,5 @@ INSTANTIATE_TEST_SUITE_P(CaptureTests,
 			 testing::Combine(testing::ValuesIn(ROLES),
 					  testing::ValuesIn(NUMREQUESTS)),
 			 SingleStream::nameParameters);
+
+} /* namespace */