timespec_get is not available on the Android API levels we target, causing compilation failures in debug builds of src/coreclr/utilcode/debug.cpp.

Changes

• Added HOST_ANDROID to the existing preprocessor conditionals that select gettimeofday over timespec_get
• Updated include guards for <sys/time.h> to include Android

Android now follows the same codepath as iOS, tvOS, and macCatalyst:

#if defined(HOST_IOS) || defined(HOST_TVOS) || defined(HOST_MACCATALYST) || defined(HOST_ANDROID)
    // timespec_get is only available on iOS 13.0+ and not supported on Android API levels we target
    struct timeval tv;
    gettimeofday(&tv, nullptr);
    ts.tv_sec = tv.tv_sec;
    ts.tv_nsec = tv.tv_usec * 1000;
#else
    int ret = timespec_get(&ts, TIME_UTC);
#endif

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