Move adb RSA utilities into its own library.

Since both the client and daemon will now be generating keys.

BUG: b/111434128

Test: atest adb_crypto_test
Change-Id: I6fac562ae5629ab30b6639fbd88d822dae6e96bd
diff --git a/TEST_MAPPING b/TEST_MAPPING
index d6945e3..0ec505d 100644
--- a/TEST_MAPPING
+++ b/TEST_MAPPING
@@ -4,6 +4,12 @@
       "name": "adbd_test"
     },
     {
+      "name": "adb_crypto_test"
+    },
+    {
+      "name": "adb_tls_connection_test"
+    },
+    {
       "name": "CtsInitTestCases"
     },
     {