adb: win32: fix ReportServerStartupFailure

The code was passing an fd from adb_open() to android::base::ReadFdToString() which actually
takes a C-Runtime fd (on Windows), so it wasn't working.

The fix is to use APIs that deal with C-Runtime fds:
* unix_open()
* android::base::unique_fd
* unix_lseek() (added in this change)

I also removed an unnecessary call to GetProcessId() since we already have the process id
from the structure returned by CreateProcess().

Test: adb start-server on Win10 and Ubuntu (with a failing server)
Test: mma

Change-Id: Id6e2dd5532a02fe5d9caf96aa007a1b3434a0b59
Signed-off-by: Spencer Low <CompareAndSwap@gmail.com>
diff --git a/adb.cpp b/adb.cpp
index 791899e..62e8908 100644
--- a/adb.cpp
+++ b/adb.cpp
@@ -633,11 +633,11 @@
     fprintf(stderr, "Full server startup log: %s\n", GetLogFilePath().c_str());
     fprintf(stderr, "Server had pid: %d\n", pid);
 
-    unique_fd fd(adb_open(GetLogFilePath().c_str(), O_RDONLY));
+    android::base::unique_fd fd(unix_open(GetLogFilePath().c_str(), O_RDONLY));
     if (fd == -1) return;
 
     // Let's not show more than 128KiB of log...
-    adb_lseek(fd, -128 * 1024, SEEK_END);
+    unix_lseek(fd, -128 * 1024, SEEK_END);
     std::string content;
     if (!android::base::ReadFdToString(fd, &content)) return;
 
@@ -827,7 +827,7 @@
                 memcmp(temp, expected, expected_length) == 0) {
                 got_ack = true;
             } else {
-                ReportServerStartupFailure(GetProcessId(process_handle.get()));
+                ReportServerStartupFailure(pinfo.dwProcessId);
                 return -1;
             }
         } else {