Don't depend on a specific micro version of libc

android-activity/Cargo.toml

@@ -16,7 +16,7 @@ license = "MIT OR Apache-2.0"
 # are actually mutually exclusive.
 #
 # In general it's only the final application crate that needs
-# to decide in a backend.
+# to decide on a backend.
 default=[]
 game-activity = []
 native-activity = []
@@ -30,7 +30,7 @@ ndk-context = "0.1"
 android-properties = "0.2"
 num_enum = "0.5"
 bitflags = "1.3"
-libc = "0.2.84"
+libc = "0.2"
 
 [build-dependencies]
 cc = { version = "1.0", features = ["parallel"] }