Fix static dependency on libprotobuf-cpp-lite-ndk

Soong was adding shared dependency on libprotobuf-cpp-lite-ndk in
addition to the manual static dependency.  This resulted in ODR
issues when libc++.so was loaded through libprotobuf-cpp-lite.so.
Set proto.static: true to tell Soong to use the static dependency.

Test: atest sdkextensions_e2e_tests
Change-Id: I2c9f439b98d277e6b53edd2e309f48aade089c45

apex/sdkextensions/derive_sdk/Android.bp

@@ -20,13 +20,13 @@ cc_defaults {
     ],
     proto: {
         type: "lite",
+        static: true,
     },
     sdk_version: "current",
     stl: "c++_static",
     shared_libs: [ "liblog" ],
     static_libs: [
         "libbase_ndk",
-        "libprotobuf-cpp-lite-ndk",
     ],
 }