Add rust-analyzer to the prebuilt components

Bug: 160228803
Test: Local build
Change-Id: I0d2cf12f1ef9293e8f1941b87fea307095dc429c

Author: tweksteen

config_toml.py

@@ -136,7 +136,7 @@ def device_config(target):
 vendor = true
 full-bootstrap = true
 extended = true
-tools = ["cargo", "clippy", "rustfmt"]
+tools = ["cargo", "clippy", "rustfmt", "rust-analyzer"]
 cargo-native-static = true
 [install]
 prefix = "/"