Add a keys argument to tapas

Add a keys argument to tapas that allows specifying devkeys to
use internal aosp_devkeys_* products that use the internal
devkeys, which will allow building unbundled apps that use platform
keys for testing.

Bug: 216553104
Test: tapas CarMediaApp devkeys
Change-Id: I2161be9e15f99713e11d22901d6eb7ad3c420093

envsetup.sh

@@ -753,7 +753,9 @@ function tapas()
     local arch="$(echo $* | xargs -n 1 echo | \grep -E '^(arm|x86|arm64|x86_64)$' | xargs)"
     local variant="$(echo $* | xargs -n 1 echo | \grep -E '^(user|userdebug|eng)$' | xargs)"
     local density="$(echo $* | xargs -n 1 echo | \grep -E '^(ldpi|mdpi|tvdpi|hdpi|xhdpi|xxhdpi|xxxhdpi|alldpi)$' | xargs)"
-    local apps="$(echo $* | xargs -n 1 echo | \grep -E -v '^(user|userdebug|eng|arm|x86|arm64|x86_64|ldpi|mdpi|tvdpi|hdpi|xhdpi|xxhdpi|xxxhdpi|alldpi)$' | xargs)"
+    local keys="$(echo $* | xargs -n 1 echo | \grep -E '^(devkeys)$' | xargs)"
+    local apps="$(echo $* | xargs -n 1 echo | \grep -E -v '^(user|userdebug|eng|arm|x86|arm64|x86_64|ldpi|mdpi|tvdpi|hdpi|xhdpi|xxhdpi|xxxhdpi|alldpi|devkeys)$' | xargs)"
+
 
     if [ "$showHelp" != "" ]; then
       $(gettop)/build/make/tapasHelp.sh
@@ -772,13 +774,21 @@ function tapas()
         echo "tapas: Error: Multiple densities supplied: $density"
         return
     fi
+    if [ $(echo $keys | wc -w) -gt 1 ]; then
+        echo "tapas: Error: Multiple keys supplied: $keys"
+        return
+    fi
 
     local product=aosp_arm
     case $arch in
       x86)    product=aosp_x86;;
       arm64)  product=aosp_arm64;;
       x86_64) product=aosp_x86_64;;
     esac
+    if [ -n "$keys" ]; then
+        product=${product/aosp_/aosp_${keys}_}
+    fi;
+
     if [ -z "$variant" ]; then
         variant=eng
     fi

tapasHelp.sh

@@ -6,7 +6,7 @@ SCRIPT_DIR="${PWD}"
 cd ../..
 TOP="${PWD}"
 
-message='usage: tapas [<App1> <App2> ...] [arm|x86|arm64|x86_64] [eng|userdebug|user]
+message='usage: tapas [<App1> <App2> ...] [arm|x86|arm64|x86_64] [eng|userdebug|user] [devkeys]
 
 tapas selects individual apps to be built by the Android build system. Unlike
 "lunch", "tapas" does not request the building of images for a device.