Precompile python sources

This signifigantly improves the startup time of soong-built
python binaries. For example, running
`m apexer && time out/host/linux-x86/bin/apexer` gives
0.734s before this cl, and 0.094s after.

Fixes: 259718110
Test: Presubmits
Change-Id: Ib19e83e2c60c39a849525be117279c318de3afa7
diff --git a/python/Android.bp b/python/Android.bp
index 4584f1e..7578673 100644
--- a/python/Android.bp
+++ b/python/Android.bp
@@ -9,6 +9,7 @@
         "blueprint",
         "soong-android",
         "soong-tradefed",
+        "soong-cc",
     ],
     srcs: [
         "binary.go",