Pipe Android/ADB logs into CLI

[wheregmis]

Plan is to pipe either fatal or RustStdoutStder into default, and all verbose when tracing is on in CLI.

When tracing is off, we strip the adb logcat prefix

When tracing is on, we just forward the logs without stripping anything (As there could be other logs outside of RustStdoutStder which might be helpful to know where its originated from)

00:42:19 [android] I/RustStdoutStderr( 7764): [1028/004219.017517:ERROR:android_webview/browser/variations/variations_seed_loader.cc:39] Seed missing signature.
00:42:19 [android] I/RustStdoutStderr( 7764): [1028/004219.030175:INFO:android_webview/browser/variations/variations_seed_loader.cc:67] Failed to open file for reading.: No such file or directory (2)
00:42:20 [android] I/RustStdoutStderr( 7764): [WARNING:net/dns/dns_config_service_android.cc:69] Failed to read DnsConfig.
00:42:20 [android] I/RustStdoutStderr( 7764): [WARNING:android_webview/browser/network_service/net_helpers.cc:143] HTTP Cache size is: 20971520
00:42:20 [android] I/RustStdoutStderr( 7764): s_glBindAttribLocation: bind attrib 0 name position
00:42:20 [android] I/RustStdoutStderr( 7764): s_glBindAttribLocation: bind attrib 1 name color
00:42:22 [android] I/RustStdoutStderr( 7764): s_glBindAttribLocation: bind attrib 0 name inPosition
00:42:22 [android] I/RustStdoutStderr( 7764): s_glBindAttribLocation: bind attrib 1 name inColor
00:42:22 [android] I/RustStdoutStderr( 7764): s_glBindAttribLocation: bind attrib 2 name inCircleEdge
00:42:22 [android] I/RustStdoutStderr( 7764): s_glBindAttribLocation: bind attrib 0 name inPosition
00:42:22 [android] I/RustStdoutStderr( 7764): s_glBindAttribLocation: bind attrib 1 name inColor
00:42:22 [android] I/RustStdoutStderr( 7764): s_glBindAttribLocation: bind attrib 2 name inTextureCoords
00:42:22 [android] I/RustStdoutStderr( 7764): s_glBindAttribLocation: bind attrib 0 name inPosition
00:42:22 [android] I/RustStdoutStderr( 7764): s_glBindAttribLocation: bind attrib 1 name inColor
00:42:22 [android] I/RustStdoutStderr( 7764): s_glBindAttribLocation: bind attrib 2 name inCircleEdge
00:42:22 [android] I/RustStdoutStderr( 7764): s_glBindAttribLocation: bind attrib 0 name position
00:42:22 [android] I/RustStdoutStderr( 7764): s_glBindAttribLocation: bind attrib 1 name localCoord

[jkelleyrtp]

Thanks for the PR!

I made some changes to make this code fit better with the rest of the codebase.

Some feedback:

• We don't want to block any arms of the top-level serve command for too long, so I moved the logcat stdout reader into its own task
• The logcat stdout reader now just sends it messages over a buffer which is a bit nicer to process
• I flattened the log cleanup in the push_log method. It's better to not have so many early returns everywhere, and instead try to process things linearly.

Otherwise, this is a much much much nicer experience than what we needed to do earlier for adb logcat. Thanks so much for helping implement it!