logging: Address some issues

src/common/logging/backend.cpp

@@ -352,6 +352,9 @@ private:
         lambda(static_cast<Backend&>(debugger_backend));
         lambda(static_cast<Backend&>(color_console_backend));
         lambda(static_cast<Backend&>(file_backend));
+#ifdef ANDROID
+        lambda(static_cast<Backend&>(lc_backend));
+#endif
     }
 
     static void Deleter(Impl* ptr) {
@@ -394,6 +397,9 @@ private:
     DebuggerBackend debugger_backend{};
     ColorConsoleBackend color_console_backend{};
     FileBackend file_backend;
+#ifdef ANDROID
+    LogcatBackend lc_backend{};
+#endif
 
     MPSCQueue<Entry> message_queue{};
     std::chrono::steady_clock::time_point time_origin{std::chrono::steady_clock::now()};

src/common/logging/formatter.h

@@ -5,7 +5,7 @@
 #pragma once
 
 #include <type_traits>
-#include <fmt/core.h>
+#include <fmt/format.h>
 
 // adapted from https://github.com/fmtlib/fmt/issues/2704
 // a generic formatter for enum classes