Convert Android.mk to Android.bp for CtsShim*

Bug: 138429615
Test: File was mostly auto-generated via `androidmk`, except the
manifest generation bit. All modules verified to be compiling, and
correct hash verified beign present in the CtsShimPriv manifest:

$ sha512sum -b \
out/soong/.intermediates/frameworks/base/packages/CtsShim/build/CtsShimPrivUpgrade/android_common/CtsShimPrivUpgrade.apk
88828701aa191d9cfd7fe839bc0d0ba159e3c21dd85fb5bcd7d15e9e66ea7d88d8f6e2369a911b567571a6750e424f3c1424a927f8fde559535c7329778b7eb9

$ sha512sum -b \
out/soong/.intermediates/frameworks/base/packages/CtsShim/build/CtsShimPrivUpgradeWrongSHA/android_common/CtsShimPrivUpgradeWrongSHA.apk
55df1add673f13671e35de14540b427320f52fafff593c56e6dcc81d8b4fbde508d596edf8a326f764c58b70bcb94b63c6baacba1f8c6e4940c179a77dfc1ab1

$ aapt2 dump xmltree --file AndroidManifest.xml \
out/soong/.intermediates/frameworks/base/packages/CtsShim/build/CtsShimPriv/android_common/CtsShimPriv.apk \
| grep hash
        A:
	http://schemas.android.com/apk/res/android:hash(0x01010526)="88828701aa191d9cfd7fe839bc0d0ba159e3c21dd85fb5bcd7d15e9e66ea7d88d8f6e2369a911b567571a6750e424f3c1424a927f8fde559535c7329778b7eb9"
	(Raw:
	"88828701aa191d9cfd7fe839bc0d0ba159e3c21dd85fb5bcd7d15e9e66ea7d88d8f6e2369a911b567571a6750e424f3c1424a927f8fde559535c7329778b7eb9")

Change-Id: Ie6e0df9f4f1365b5194e9748b325b421f838c65b