build: enable the Android SDKs to be built, packaged, and tested

[compnerd]

Build and package the Android SDKs on Windows as part of the toolchain distribution. This requires further fine tuning to improve the DevEx, however, this ensures that we do not backslide on the ability to build and package the SDK as a starting point.

[compnerd]

@swift-ci please test Windows platform

[compnerd]

@swift-ci please test Windows platform

[compnerd]

@swift-ci please build toolchain Windows platform

[compnerd]

@swift-ci please smoke test

[weliveindetail]

PR test failed with:

********************
Failed Tests (1):
  Swift(android-aarch64) :: ClangImporter/availability_custom_domains.swift

********************
Unexpectedly Passed Tests (3):
  Swift(android-aarch64) :: Driver/parseable_output.swift
  Swift(android-aarch64) :: Driver/parseable_output_unicode.swift
  Swift-validation(android-aarch64) :: compiler_crashers_fixed/28795-inprotocol-isrequirementsignaturecomputed-missing-signature.swift

Added 1 more XFAL in #80053. The XPASSes are in the filter already and should have been skipped. Not sure why it doesn't apply here. Same code works for LLDB.

[compnerd]

@swift-ci please test Windows platform

[compnerd]

CC: @shahmishal, @etcwilde

This adds only the ARM64 slice for PR testing (we run through all the architectures on the nightly).

[compnerd]

@swift-ci please test Windows platform

[compnerd]

@swift-ci please test Windows platform

[shahmishal]

How much more time does this add to the build?

[shahmishal]

@swift-ci please test Windows platform

[compnerd]

The build will add ~12m for the SDK, and the non-executable testing time (which fluctuates)

[compnerd]

Testing Time: 1266.55s

Build-Runtime             Android  aarch64 00:08:17.95  2.9%  
Build-ExperimentalRuntime Android  aarch64 00:05:23.93  1.9%  
Build-Foundation          Android  aarch64 00:02:25.02  0.8%  
Build-Foundation          Android  aarch64 00:02:20.04  0.8%  
Build-Sanitizers          Android  aarch64 00:00:58.11  0.3%  
Build-LLVM                Android  aarch64 00:00:55.94  0.3%  
Build-CURL                Android  aarch64 00:00:47.73  0.3%  
Build-Dispatch            Android  aarch64 00:00:27.92  0.2%  
Build-Testing             Android  aarch64 00:00:27.17  0.2%  
Build-Inspect             Android  aarch64 00:00:23.69  0.1%  
Build-XML2                Android  aarch64 00:00:17.73  0.1%  
Build-ZLib                Android  aarch64 00:00:14.36  0.1%  
Build-XCTest              Android  aarch64 00:00:06.94  0%    

We are basically building a full Android SDK (Core Libraries, Overlays, Supplemental Libraries, libdispatch, Foundation, XCTest, Testing), building the new experimental runtime build, and running the non-executable tests.

We could shave the time for the experimental runtime builds I suppose, but it takes about 23m to do the build and 21m to run the tests. We could reduce the build times down to 18m by skipping the new runtimes build.