Fix dir reader header selection on Android

Use Linux implementation on Android

Author: Vitali Lovich

src/base/files/dir_reader_posix.h

@@ -17,15 +17,15 @@
 // seems worse than falling back to enumerating all file descriptors so we will
 // probably never implement this on the Mac.
 
-#if defined(OS_LINUX)
+#if defined(OS_LINUX) || defined(OS_ANDROID)
 #include "base/files/dir_reader_linux.h"
 #else
 #include "base/files/dir_reader_fallback.h"
 #endif
 
 namespace base {
 
-#if defined(OS_LINUX)
+#if defined(OS_LINUX) || defined(OS_ANDROID)
 typedef DirReaderLinux DirReaderPosix;
 #else
 typedef DirReaderFallback DirReaderPosix;