pps: Generate libgpudataprofiling.so from pps-producer sources for Android CTS

Android CTS expects GPU counters to be provided by a DSO named
libgpudataprofiling.so. This change leaves pps-producer unchanged and builds
this DSO from the same sources.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36052>

src/tool/pps/meson.build

@@ -40,6 +40,16 @@ executable(
   install: true
 )
 
+if with_platform_android
+  shared_library(
+    'gpudataproducer',
+    sources: producer_sources,
+    include_directories: [include_pps, inc_src],
+    dependencies: [dep_pps, dep_perfetto],
+    install: true
+  )
+endif
+
 config_sources = [
   'pps_config.cc'
 ]

src/tool/pps/pps_producer.cc

@@ -9,9 +9,10 @@
 
 #include <cstdlib>
 
+#include "util/detect_os.h"
 #include "pps_datasource.h"
 
-int main(int argc, const char **argv)
+int init(std::string &driver_name)
 {
    using namespace pps;
 
@@ -20,8 +21,6 @@ int main(int argc, const char **argv)
    args.backends = perfetto::kSystemBackend;
    perfetto::Tracing::Initialize(args);
 
-   std::string driver_name =
-      (argc > 1) ? Driver::find_driver_name(argv[1]) : Driver::default_driver_name();
    GpuDataSource::register_data_source(driver_name);
 
    const auto &driver = Driver::get_supported_drivers().at(driver_name);
@@ -35,3 +34,20 @@ int main(int argc, const char **argv)
 
    return EXIT_SUCCESS;
 }
+
+int main(int argc, const char **argv)
+{
+   using namespace pps;
+   std::string driver_name =
+      (argc > 1) ? Driver::find_driver_name(argv[1]) : Driver::default_driver_name();
+   return init(driver_name);
+}
+
+#if DETECT_OS_ANDROID
+extern "C" int start()
+{
+   using namespace pps;
+   std::string driver_name = Driver::default_driver_name();
+   return init(driver_name);
+}
+#endif