don't include liblog to APEXes

liblog is a platform library that provides stable C API. There is no
need to include the library, especialy by statically linking to it, in
any APEX. It not only wastes the storage/ram, but also is incorrect
because the socket interface to logd which is implemented in liblog is
not guaranteed to be stable.

Fixing this issue by converting static_libs: ["liblog"] into
shared_libs: ["liblog"], in which case the dependency to the library
is satisfied via the stub variant of the library.

As a result, we could restrict the availablity of the library to
the platform and the runtime APEX.

Exempt-From-Owner-Approval: already approved when this was in internal
master (ag/10572699)

Bug: http://b/151051671
Bug: http://b/150827719
Test: m
Change-Id: I5aab863cb12b8767b6979255c247000a59355b0e
diff --git a/adb/Android.bp b/adb/Android.bp
index 139ee23..abd6f32 100644
--- a/adb/Android.bp
+++ b/adb/Android.bp
@@ -589,7 +589,6 @@
         "libcrypto_utils",
         "libcutils_sockets",
         "libdiagnose_usb",
-        "liblog",
         "libmdnssd",
         "libminijail",
         "libprotobuf-cpp-lite",
@@ -603,6 +602,7 @@
         "libadbd_auth",
         "libadbd_fs",
         "libcrypto",
+        "liblog",
     ],
 
     target: {