Fix Android debug build: Add HOST_ANDROID to timespec_get fallback (#121425)

`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:

```cpp
#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
```

<!-- START COPILOT CODING AGENT SUFFIX -->



<details>

<summary>Original prompt</summary>

> When built for Android in the debug configuration,
src/coreclr/utilcode/debug.cpp fails to compile because timespec_get is
not supported for the API level we target. HOST_ANDROID needs to be
added to #define checks so that it will fall through the gettimeofday
path.


</details>



<!-- START COPILOT CODING AGENT TIPS -->
---

✨ Let Copilot coding agent [set things up for
you](https://github.com/dotnet/runtime/issues/new?title=✨+Set+up+Copilot+instructions&body=Configure%20instructions%20for%20this%20repository%20as%20documented%20in%20%5BBest%20practices%20for%20Copilot%20coding%20agent%20in%20your%20repository%5D%28https://gh.io/copilot-coding-agent-tips%29%2E%0A%0A%3COnboard%20this%20repo%3E&assignees=copilot)
— coding agent works faster and does higher quality work when set up for
your repo.

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: steveisok <[email protected]>

Author: Copilot

src/coreclr/utilcode/debug.cpp

@@ -12,7 +12,7 @@
 #include "ex.h"
 #include "corexcep.h"
 #include <time.h>
-#if defined(HOST_IOS) || defined(HOST_TVOS) || defined(HOST_MACCATALYST)
+#if defined(HOST_IOS) || defined(HOST_TVOS) || defined(HOST_MACCATALYST) || defined(HOST_ANDROID)
 #include <sys/time.h>
 #endif
 
@@ -163,8 +163,8 @@ VOID LogAssert(
     STRESS_LOG2(LF_ASSERT, LL_ALWAYS, "ASSERT:%s:%d\n", szFile, iLine);
 
     struct timespec ts;
-#if defined(HOST_IOS) || defined(HOST_TVOS) || defined(HOST_MACCATALYST)
-    // timespec_get is only available on iOS 13.0+, use gettimeofday instead
+#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, use gettimeofday instead
     struct timeval tv;
     gettimeofday(&tv, nullptr);
     ts.tv_sec = tv.tv_sec;