Fix process execution on Windows 7

According to this bug report on Firefox:
<https://bugzilla.mozilla.org/show_bug.cgi?id=1460995>

> CreateProcess fails with ERROR_NO_SYSTEM_RESOURCES on Windows 7. It
> looks like the reason why is because PROC_THREAD_ATTRIBUTE_HANDLE_LIST
> doesn't like console handles.

To avoid the problem, do not pass console handles to
PROC_THREAD_ATTRIBUTE_HANDLE_LIST.

Refs #2783 <https://github.com/Genymobile/scrcpy/pull/2783>
Refs f801d8b312
Fixes #2838 <https://github.com/Genymobile/scrcpy/issues/2838>

server/build_without_gradle.sh

@@ -14,7 +14,8 @@ set -e
 SCRCPY_DEBUG=false
 SCRCPY_VERSION_NAME=1.21
 
-PLATFORM=${ANDROID_PLATFORM:-31}
+PLATFORM_VERSION=31
+PLATFORM=${ANDROID_PLATFORM:-$PLATFORM_VERSION}
 BUILD_TOOLS=${ANDROID_BUILD_TOOLS:-31.0.0}
 
 BUILD_DIR="$(realpath ${BUILD_DIR:-build_manual})"
@@ -56,7 +57,7 @@ javac -bootclasspath "$ANDROID_JAR" -cp "$CLASSES_DIR" -d "$CLASSES_DIR" \
 echo "Dexing..."
 cd "$CLASSES_DIR"
 
-if [[ $PLATFORM -lt 31 ]]
+if [[ $PLATFORM_VERSION -lt 31 ]]
 then
     # use dx
     "$ANDROID_HOME/build-tools/$BUILD_TOOLS/dx" --dex \