[Bug]: CaptureStream (stdout, stderr) not working on recent Android version for app environment

[richard1122]

Describe the issue

While running GTest from JNI, we may need to CaptureStdout to a file and redirect to logcat.

Right now it uses /data/local/tmp/, which is writeable when it's a standalone executable by running through adb shell, but not when it's in dalvik/art.

Related: https://github.com/google/googletest/blob/39a26e12d67ed6c21feeb606372bfee39a8e6d53/googletest/src/gtest-port.cc#L1049-L1061

Steps to reproduce the problem

Adb environment:

adb shell
emu64a:/ $ touch /data/local/tmp/temp-file-adb
emu64a:/ $ echo "content" > /data/local/tmp/temp-file-adb
emu64a:/ $ cat /data/local/tmp/temp-file-adb
content

APP environment (Use run-as to emulate):

run-as com.richard.testing
touch /data/local/tmp/temp-file-app
touch: '/data/local/tmp/temp-file-app': Permission denied

What version of GoogleTest are you using?

03597a01ee50ed33e9dfd640b249b4be3799d395

What operating system and version are you using?

Android 13, arm64

What compiler and version are you using?

Android NDK 25.1.8937393 Clang:

Android (8490178, based on r450784d) clang version 14.0.6 (https://android.googlesource.com/toolchain/llvm-project 4c603efb0cca074e9238af8b4106c30add4418f6)
Target: x86_64-apple-darwin22.3.0
Thread model: posix
InstalledDir: /Users/richard/Library/Android/sdk/ndk/25.1.8937393/toolchains/llvm/prebuilt/darwin-x86_64/bin

What build system are you using?

3.25.2

Additional context

I found we have existing code to get temp folder path from ENV, and fallback to /data/local/tmp: https://github.com/google/googletest/blob/2057566e4e16c88f1fea4d6c96b2e2bfb87507a6/googletest/src/gtest.cc#L6801-L6802

If you think this is a good to keep the same logic in CaptureStream? Which will make it works in ADB and APP environment. If so, I can open a PR later.