Android: fetch_deps.py - don't allow uppercase in CIPD paths.

CIPD does not allow them.

Splitting this off from larger change where the problem was hit:
http://crrev.com/c/1885951

Bug: 693079
Change-Id: I068bf8fd01044f5c80307f7f68de5bd03b1ed1f3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1888373
Auto-Submit: Andrew Grieve <agrieve@chromium.org>
Reviewed-by: Sam Maier <smaier@chromium.org>
Commit-Queue: Sam Maier <smaier@chromium.org>
Cr-Commit-Position: refs/heads/master@{#710483}

tools/android/roll/android_deps/buildSrc/src/main/groovy/BuildConfigGenerator.groovy

@@ -351,7 +351,8 @@ class BuildConfigGenerator extends DefaultTask {
             } else {
                 cipdPath += repoPath
             }
-            cipdPath += "/${depPath}"
+            // CIPD does not allow uppercase in names.
+            cipdPath += "/${depPath}".toLowerCase()
             sb.append("""\
             |
             |  'src/${repoPath}/${depPath}': {
@@ -436,7 +437,8 @@ class BuildConfigGenerator extends DefaultTask {
         } else {
             cipdPath += repoPath
         }
-        cipdPath += "/${DOWNLOAD_DIRECTORY_NAME}/${dependency.id}"
+        // CIPD does not allow uppercase in names.
+        cipdPath += "/${DOWNLOAD_DIRECTORY_NAME}/" + dependency.id.toLowerCase()
 
         // NOTE: the fetch_all.py script relies on the format of this file!
         // See fetch_all.py:GetCipdPackageInfo().