Move vendor-ndk and system-sdk to system_ext manifest

... from system manifest. Needed for CSI.

Bug: 137712494
Test: m check-vintf-all and inspect output

Change-Id: Ibc2444d56bb0d8801378403bcc60a120b8b18fa8
Merged-In: Ibc2444d56bb0d8801378403bcc60a120b8b18fa8
1 file changed