Revert "[android] Do not create Timers on Default main loops"

This reverts commit 13cd75f099.

platform/android/src/run_loop.cpp

@@ -80,8 +80,6 @@ RunLoop::Impl::Impl(RunLoop* runLoop_, RunLoop::Type type) : runLoop(runLoop_) {
     case Type::Default:
         ret = ALooper_addFd(loop, fds[PIPE_OUT], ALOOPER_POLL_CALLBACK,
             ALOOPER_EVENT_INPUT, looperCallbackDefault, this);
-        running = true;
-        isDefaultLoop = true;
         break;
     }
 

platform/android/src/run_loop_impl.hpp

@@ -41,7 +41,6 @@ public:
     ALooper* loop = nullptr;
     RunLoop* runLoop = nullptr;
     util::Atomic<bool> running;
-    bool isDefaultLoop = false;
 
 private:
     friend RunLoop;

platform/android/src/timer.cpp

@@ -3,7 +3,6 @@
 #include <mbgl/util/run_loop.hpp>
 #include <mbgl/util/timer.hpp>
 
-#include <cassert>
 #include <functional>
 
 namespace mbgl {
@@ -12,7 +11,6 @@ namespace util {
 class Timer::Impl : public RunLoop::Impl::Runnable {
 public:
     Impl() {
-        assert(!loop->isDefaultLoop);
         loop->initRunnable(this);
     }