Get NDK python script tests running.

Imports weren't working in tests because the package had been created.
The Python "binaries" built by Soong don't seem to take their own
pkg_path into account, so I split the separate pieces of code here out
into their own packages.

Note that the ndk_api_coverage_parser tests do not actually pass
before or after this change (seems like it might be a
non-deterministic ordering issue in the attributes of the generated
output?), but they can at least be run now.

Test: pytest ndkstubgen
Test: pytest symbolfile
Test: pytest ndk_api_coverage_parser
Test: out/host/linux-x86/nativetest64/test_ndkstubgen/test_ndkstubgen
Test: out/host/linux-x86/nativetest64/test_symbolfile/test_symbolfile
Test: out/host/linux-x86/nativetest64/test_ndk_api_coverage_parser/test_ndk_api_coverage_parser
Bug: None
Change-Id: I2ac22f7ced7566e4808070f2f72fd04355846e0b
diff --git a/OWNERS b/OWNERS
index dbb491d..8355d10 100644
--- a/OWNERS
+++ b/OWNERS
@@ -6,9 +6,8 @@
 per-file * = patricearruda@google.com
 per-file * = paulduffin@google.com
 
-per-file ndk_*.go, *gen_stub_libs.py = danalbert@google.com
+per-file ndk_*.go = danalbert@google.com
 per-file clang.go,global.go = srhines@google.com, chh@google.com, pirama@google.com, yikong@google.com
 per-file tidy.go = srhines@google.com, chh@google.com
 per-file lto.go,pgo.go = srhines@google.com, pirama@google.com, yikong@google.com
 per-file docs/map_files.md = danalbert@google.com, enh@google.com, jiyong@google.com
-per-file *ndk_api_coverage_parser.py = sophiez@google.com
\ No newline at end of file