packages/apps/KeyChain: Set LOCAL_SDK_VERSION where possible.

This change sets LOCAL_SDK_VERSION for all packages where
this is possible without breaking the build, and
LOCAL_PRIVATE_PLATFORM_APIS := true otherwise.

Setting one of these two will be made required soon, and this
is a change in preparation for that. Not setting LOCAL_SDK_VERSION
makes the app implicitly depend on the bootclasspath, which is
often not required. This change effectively makes depending on
private apis opt-in rather than opt-out.

Test: make relevant packages
Bug: 73535841
Change-Id: Ib45c692389f1ef7a27a3a6ba03f88f35c97dc56a
3 files changed
tree: edf1039da67e0f5798fdb9903fac86e98e57704a
  1. res/
  2. src/
  3. support/
  4. tests/
  5. Android.mk
  6. AndroidManifest.xml