Reland "[Fuchsia] only download fuchsia deps when necessary (#51439)"

.ci.yaml

@@ -209,6 +209,10 @@ targets:
     properties:
       release_build: "true"
       config_name: linux_fuchsia
+      gclient_variables: >-
+        {
+          "download_android_deps": false
+        }
     # Do not remove(https://github.com/flutter/flutter/issues/144644)
     # Scheduler will fail to get the platform
     drone_dimensions:

DEPS

@@ -1210,7 +1210,7 @@ hooks = [
   {
     'name': 'Download Fuchsia system images',
     'pattern': '.',
-    'condition': 'run_fuchsia_emu',
+    'condition': 'download_fuchsia_deps and run_fuchsia_emu',
     'action': [
       'env',
       'DOWNLOAD_FUCHSIA_SDK={download_fuchsia_sdk}',

ci/builders/linux_fuchsia.json

@@ -5,9 +5,6 @@
                 "device_type=none",
                 "os=Linux"
             ],
-            "gclient_variables": {
-                "download_android_deps": false
-            },
             "gn": [
                 "--fuchsia",
                 "--fuchsia-cpu",
@@ -31,7 +28,6 @@
                 "os=Linux"
             ],
             "gclient_variables": {
-                "download_android_deps": false,
                 "run_fuchsia_emu": true
             },
             "gn": [
@@ -68,9 +64,6 @@
                 "device_type=none",
                 "os=Linux"
             ],
-            "gclient_variables": {
-                "download_android_deps": false
-            },
             "gn": [
                 "--fuchsia",
                 "--fuchsia-cpu",
@@ -94,7 +87,6 @@
                 "os=Linux"
             ],
             "gclient_variables": {
-                "download_android_deps": false,
                 "run_fuchsia_emu": true
             },
             "gn": [
@@ -131,9 +123,6 @@
                 "device_type=none",
                 "os=Linux"
             ],
-            "gclient_variables": {
-                "download_android_deps": false
-            },
             "gn": [
                 "--fuchsia",
                 "--fuchsia-cpu",
@@ -173,7 +162,6 @@
                 "os=Linux"
             ],
             "gclient_variables": {
-                "download_android_deps": false,
                 "run_fuchsia_emu": true
             },
             "gn": [
@@ -210,9 +198,6 @@
                 "device_type=none",
                 "os=Linux"
             ],
-            "gclient_variables": {
-                "download_android_deps": false
-            },
             "gn": [
                 "--fuchsia",
                 "--fuchsia-cpu",
@@ -236,7 +221,6 @@
                 "os=Linux"
             ],
             "gclient_variables": {
-                "download_android_deps": false,
                 "run_fuchsia_emu": true
             },
             "gn": [
@@ -273,10 +257,6 @@
                 "device_type=none",
                 "os=Linux"
             ],
-            "gclient_variables": {
-                "download_android_deps": false,
-                "run_fuchsia_emu": true
-            },
             "gn": [
                 "--fuchsia",
                 "--fuchsia-cpu",
@@ -300,7 +280,6 @@
                 "os=Linux"
             ],
             "gclient_variables": {
-                "download_android_deps": false,
                 "run_fuchsia_emu": true
             },
             "gn": [
@@ -337,10 +316,6 @@
                 "device_type=none",
                 "os=Linux"
             ],
-            "gclient_variables": {
-                "download_android_deps": false,
-                "run_fuchsia_emu": true
-            },
             "gn": [
                 "--fuchsia",
                 "--fuchsia-cpu",
@@ -380,7 +355,6 @@
                 "os=Linux"
             ],
             "gclient_variables": {
-                "download_android_deps": false,
                 "run_fuchsia_emu": true
             },
             "gn": [