Quiet ds-docs-switched

The ds-docs-switched genrule was producing 18947 lines of output,
including a single line with 266986 bytes.  Quiet all the tools
used in the genrule.

Test: m ds-docs-switched
Change-Id: I5549c34f6310469e7791b56190d5b7c1f386a5f7
diff --git a/ApiDocs.bp b/ApiDocs.bp
index 04ddc50..b7e3646 100644
--- a/ApiDocs.bp
+++ b/ApiDocs.bp
@@ -356,10 +356,10 @@
     dist: {
         targets: ["docs"],
     },
-    cmd: "unzip $(location :ds-docs-java{.docs.zip}) -d $(genDir) && " +
-         "unzip $(location :ds-docs-kt{.docs.zip}) -d $(genDir)/en/reference/kotlin && " +
+    cmd: "unzip -q $(location :ds-docs-java{.docs.zip}) -d $(genDir) && " +
+         "unzip -q $(location :ds-docs-kt{.docs.zip}) -d $(genDir)/en/reference/kotlin && " +
          "SWITCHER=$$(cd $$(dirname $(location switcher4)) && pwd)/$$(basename $(location switcher4)) && " +
-         "(cd $(genDir)/en/reference && $$SWITCHER --work platform) && " +
+         "(cd $(genDir)/en/reference && $$SWITCHER --work platform) > /dev/null && " +
          "$(location soong_zip) -o $(out) -C $(genDir) -D $(genDir)",
 }