[libtrusty-rs] Add recv variant that uses Vec<u8>

* Add new `recv` method that takes a `Vec<u8>` and automatically
  allocates extra buffer space and retries the read call if the buffer
  does not have enough capacity.
* Rename the existing `recv` method to `recv_no_alloc`, and update docs
  to clarify the behaviors of both methods.
* Add tests for the new `recv` method and update existing tests to use
  `recv_no_alloc` instead.

Test: tipc-test-rs -m 1024 -t echo
Bug: 226659377
Change-Id: Ic437b617751e865da119fe0c4ef8aa456a63bf3c
diff --git a/trusty/libtrusty-rs/Android.bp b/trusty/libtrusty-rs/Android.bp
index 47c64b7..bc1dcf6 100644
--- a/trusty/libtrusty-rs/Android.bp
+++ b/trusty/libtrusty-rs/Android.bp
@@ -24,6 +24,7 @@
     ],
     rustlibs: [
         "libnix",
+        "liblibc",
     ],
 }
 
@@ -33,5 +34,6 @@
     srcs: ["tests/test.rs"],
     rustlibs: [
         "libtrusty-rs",
+        "liblibc",
     ]
 }