Revert of Replace basictypes.h with stdint.h for int_t types. (patchset #1 id:1 of https://codereview.webrtc.org/2604043002/ )

Reason for revert:
Very likely cause of Chromium import bot breakage (unused function '__cpuid'), TBD why.

Original issue's description:
> Replace basictypes.h with stdint.h for int_t types.
>
> Removes basictypes.h for types that only makes use of it for fixed-size-int
> typedefs and replaces it with stdint.h.
>
> BUG=webrtc:6853
> R=tommi@webrtc.org
>
> Review-Url: https://codereview.webrtc.org/2604043002
> Cr-Commit-Position: refs/heads/master@{#15867}
> Committed: 7fd1a75300

TBR=tommi@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:6853

Review-Url: https://codereview.webrtc.org/2603203003
Cr-Commit-Position: refs/heads/master@{#15869}

webrtc/sdk/android/src/jni/androidnetworkmonitor_jni.h

@@ -13,11 +13,10 @@
 
 #include "webrtc/base/networkmonitor.h"
 
-#include <stdint.h>
-
 #include <map>
 
 #include "webrtc/sdk/android/src/jni/jni_helpers.h"
+#include "webrtc/base/basictypes.h"
 #include "webrtc/base/thread_checker.h"
 
 namespace webrtc_jni {