Append APEX version instead of build ID for APK-in-APEX paths.

This CL removes the build_id.mk suffix and replaces it with a hardcoded
placeholder string that will be replaced with the actual version in
apex_manifest.json by apexer at apex construction time.

This means that as long as the apex version is incremented, the
APK-in-APEX will be installed to a new directory path from the package
manager's perspective.

Fixes: 229574810
Bug: 229625490
Bug: 226559955
Bug: 224589412
Bug: 227417611
Bug: 228157333
Bug: 228803590
Bug: 229136249

Test: atest StrictJavaPackagesTest
Test: soong tests
Test: deapexer list out/dist/com.google.android.permission.apex
Change-Id: I9cef1418c3fc7e0970d96995b8398f5e82f479e0