Import Android SDK Platform P [4456821]

/google/data/ro/projects/android/fetch_artifact \
    --bid 4456821 \
    --target sdk_phone_armv7-win_sdk \
    sdk-repo-linux-platforms-4456821.zip

AndroidVersion.ApiLevel has been modified to appear as 28

Change-Id: Ic76862e378365b62f4520ad9c45261ab5a8cb677
249 files changed