Incrementing release versions for CameraX 1.2.0-rc01

Test: ./gradlew camera:camera-[camera2|core|lifecycle|video|extensions|view|mlkit-vision]:updateApi
Change-Id: Ib7e611f5a2729c03912363251dcfe234a79eff3a
diff --git a/libraryversions.toml b/libraryversions.toml
index 658cc95..4433e81 100644
--- a/libraryversions.toml
+++ b/libraryversions.toml
@@ -13,7 +13,7 @@
 BLUETOOTH = "1.0.0-alpha01"
 BROWSER = "1.5.0-alpha01"
 BUILDSRC_TESTS = "1.0.0-alpha01"
-CAMERA = "1.2.0-beta03"
+CAMERA = "1.2.0-rc01"
 CAMERA_PIPE = "1.0.0-alpha01"
 CARDVIEW = "1.1.0-alpha01"
 CAR_APP = "1.3.0-beta02"